My current expectations for "on-chain privacy" are quite simple: just don't treat wallets as anonymous IDs. Frankly, most blockchains are public ledgers; even if you perform privacy operations, you're just obfuscating the path, not erasing the person; if you really want to comply and investigate, it's still easy to connect deposit and withdrawal records, common addresses, and so on. Ordinary users can do only two things: don't mix everything in the same address, and don't treat privacy tools as a get-out-of-jail-free card, especially when it comes to parts linked to real-world identities (I think everyone is over-romanticizing "privacy = security").

Recently, before and after the upgrade of that mainstream public chain, people in the group have been guessing whether projects will migrate. I think whether they migrate or not is secondary; on-chain records can't be taken away, and moving to another chain still follows the same transparent and traceable underlying logic. As for me: if I can layer it, I layer it; if I can minimize exposure, I minimize exposure; but I don't expect complete invisibility, and I don't chase after missing it.