Vitalik: The ideal path to supporting multi-cryptography is EIP-8288, which avoids adding new precompiles.

Vitalik Buterin tweeted that he believes the ideal path to support various cryptographic schemes is EIP-8288.
Users generate arbitrary signatures locally, then use STARK proofs and incorporate them on-chain via a STARK aggregator, without consuming calldata on-chain. "This way, Ethereum will no longer need new precompiles going forward."