i've been really impressed at how well Spark managed to get distribution of their protocol from existing wallets and projects. that's a really important first step for getting users.

citrea could pull ahead if they convince enough of the L2 eth ecosystem to move over though -- and it could happen. the eth ecosystem really seems like it's at a bit of a crossroads at the moment.

one not-bitcoin payment protocol i'm keeping my eye on in terms of distribution footprint is the new stablecoin project being pioneered by the paradigm team: Tempo one. a lot of 'big' eth names have recently moved over there. bitcoin has its work cut out for it in terms of adoption from existing platforms and rails, meanwhile the 'stablecoin' army is growing (imo).