if a bitcoin transaction using a username might be a lot cooler too, I might be able to think positively in this way the transaction would seem to be great if some coinabse users often make small amounts of transactions using bitcoin, so it doesn't pile up on the bitcoin transaction network, but I say before this it still didn't look great if it was done only for coinbase users
that doesn't seem to be possible though considering how address being generated for the frivolous thing and if it's to be changed with username we'll struggle picking the username and then forced to use random number behind username which is basically the same complexity as when we're using the already existed random address.but inside a centralized system like exchange that might be possible and it's probably just a piece of cake to do that.