Simplifying the L1

https://vitalik.eth.limo/general/2025/05/03/simplel1.html

Moving ABI to SSZ will have a huge impact in general, not just at the calldata level, but 712, events, full frameworks (think mud) will need to be rewritten.  All current applications will need to change, backend / frontend, and tested, and obviously rewritten in many areas. This might mean, that applications that target different chains due to compatibility might not upgrade and keep old formats. RLP might have a smaller impact if there are new transaction types that overtake others.

If I had to lose one of the three to converge it would probably be the ABI - at least it's not consensus code, and as I wrote SSZ and ABI are pretty similar

But also, I suspect that if we just made an option in HLLs for devs to use SSZ as ABI, quite a few would start taking up the offer just for byte-efficiency reasons alone. ABI has big downsides (the 32 bytes)