RENAMING base unit is unrealistic. There will be always a split between old-naming-users and new-naming-users. Some wallets will get updated. Some will not. It's would be a mess having name collisions like that.

For something realistically doable you need backward compatible change.

More realistic proposal is to DROP the 'bitcoin' name as a unit. Bitcoin name could refer only to the protocol/network. And the currency unit would be sats. If some wallets would lag or not apply the change it would not be a big deal. Eventually everyone would converge to new convention without any name collisions on the way.