I'd argue that one of the best advantages with bitcoin is that you don't need to stay up to date with these things and just comfortably hold and DCA for the long term without caring much. The same can't be said for other cryptocurrencies as you'd need to look up updates and the team's decisions and whatnot.
Newest BIP and addresses are compatible with old BIP and addresses and Bitcoin users, if created their wallets, private keys years ago, can still use their old private keys to sign a transaction anytime.
They can import it to a new wallet or can sign a transaction to move their bitcoin to a new wallet. The matter is private key, if they have private keys, they own their bitcoin.
It's not like banks, if you don't follow bank updates, you can lose your accounts and money.