Ethereum

Maybe some crazy thought but I'm wondering if there is a direct and smart way to enshrine Tornado Cash / Railgun tech in the Ethereum base layer. While I understand that the base layer should remain as simple as possible—and I agree with that principle—it's worth considering that we've already spent considerable time prioritising other features over privacy-by-default at the foundational level.

I really liked the way eip 7503 would achieve this (eip7503.org) 
But I would preferably have something like this tested live on L2 for years before we implement it or something similar at L1. The catastrophic scenario is an inflation bug that goes unnoticed for a very long time if an attacker manage to prove invalid statements and can therefore double spend their previously burned ETH

𝐖𝐨𝐫𝐤𝐢𝐧𝐠 𝐨𝐧 𝐰𝐡𝐚𝐭'𝐬 𝐧𝐞𝐱𝐭.

https://github.com/pcaversaccio