Bitcoin and Ethereum, the two leading blockchains, are increasingly embodying contrasting philosophies around transaction inclusion, censorship resistance, and the balance between permissionless ideals and practical network management.
Bitcoin is debating whether to curate a “clean” monetary ledger through selective filtering (for example, BIP-110). Ethereum is engineering protocol-enforced inclusion through mechanisms like FOCIL (EIP-7805).
This is not a simple good-versus-bad split. It reflects a deeper tradeoff in cypherpunk values:
- Bitcoin prioritizes scarcity and immutability for sound money.
- Ethereum prioritizes verifiable neutrality to support broader censorship-resistant utility.
The question is no longer theoretical. It is architectural.
Bitcoin’s path: curation for monetary purity
Bitcoin’s core ethos has long centered on scarce, immutable digital money. But the rise of non-monetary data usage (Ordinals inscriptions, Runes tokens, and other data-heavy protocols) has renewed debate over what belongs on-chain.
BIP-110, the “Reduce Data Temporary Softfork,” reflects that curation instinct.
Selective filtering mechanics
BIP-110 proposes temporary (one-year) limits on transaction elements, including:
- Capping scriptPubKey sizes to 34 bytes
- Restricting OP_RETURN to 83 bytes
- Banning certain Tapscript opcodes (for example, OP_IF)
- Limiting Taproot tree depth and control blocks
Existing UTXOs would be grandfathered, but future transactions would be structurally constrained.
The stated intent is to preserve monetary bandwidth, reduce node burden, and prevent fee distortion from non-financial uses.
The underlying implication is that not every valid transaction is equally desirable.
The cypherpunk tradeoff
BIP-110 leans toward curation over inclusion. By narrowing acceptable constructions, it implicitly distinguishes between monetary utility and spam.
Critics argue this echoes the 2017 block size debates, where governance friction exposed deeper tensions about decentralization and control.
Current signals in the draft remain weak:
- ~8% node adoption (primarily Bitcoin Knots patches)
- 0% miner hashrate signaling
- ~7–10% prediction market odds for activation by September 2026
For now, it resembles governance signaling more than imminent change.
If Bitcoin moves toward intentional filtration, even narrowly, it reinforces a model where monetary purity outweighs expressive neutrality. That is defensible, but it is not maximal permissionlessness.
Ethereum’s path: enforced inclusion by design
Ethereum began as a general-purpose execution layer and has increasingly treated censorship resilience as a protocol objective.
The upcoming Hegota upgrade (H2 2026) includes FOCIL (EIP-7805) and complementary proposals like EIP-8141 (Frame Transactions for account abstraction).
Together, these move Ethereum from best-effort inclusion toward enforced inclusion.
How FOCIL changes the equation
Under FOCIL:
- Each slot includes one proposer and 16 randomly selected includers
- Includers publish bounded inclusion lists from the public mempool
- Blocks that ignore valid transactions risk fork-choice penalties
- Censorship requires coordination across ~17 actors
Inclusion becomes protocol-verifiable, not socially assumed.
Paired with account abstraction upgrades, this strengthens guarantees for:
- Smart wallets
- Gas-sponsored transactions
- Privacy protocol transactions (for example, shielded DeFi flows)
The objective is structural resilience: making censorship expensive, coordination-heavy, and economically irrational.
The cypherpunk tradeoff
Ethereum’s approach prioritizes enforced neutrality over minimalism: anything valid should be included, regardless of builder or validator preference.
This expands surface area, increases complexity, and introduces implementation risk. But it also embeds neutrality directly into fork choice.
Diverging risk profiles
Bitcoin’s strengths:
- Predictable monetary policy
- Low-bandwidth node requirements
- Scarcity-first narrative
Bitcoin’s risk profile:
- Gradual expansion of what is considered undesirable at the protocol level
- Narrowing expressive capacity over time
Ethereum’s strengths:
- Verifiable inclusion guarantees
- Structural resistance to censorship pressure
- Broad execution flexibility
Ethereum’s risk profile:
- Increased protocol complexity
- Validator concentration pressures
- Scalability strain (partly mitigated by L2s)
One side optimizes for monetary discipline; the other optimizes for credible neutrality.
Who is leaning harder into permissionlessness?
If permissionlessness means:
- Any valid transaction can be included
- Censorship requires costly coordination
- Neutrality is enforced rather than assumed
Then Ethereum is currently leaning harder into that model.
Bitcoin appears to be prioritizing monetary minimalism, which may be rational for its goals. But these are different philosophies.
Why this debate matters
Activation odds for BIP-110 remain under 10% in the draft’s framing, and nothing is changing tomorrow.
But architecture compounds over time. Bitcoin is debating filtration, while Ethereum is codifying inclusion.
In moments like this, the key signal is direction rather than activation probability.
The core question is not which chain is “right,” but which tradeoff better preserves decentralization under stress.