I don't understand why Twitter doesn't have the standard 30 day wait period on handle changes that most sites have. For a while it was a standard to not let old

I don't understand why Twitter doesn't have the standard 30 day wait period on handle changes that most sites have. For a while it was a standard to not let old usernames be available until 30/60/90 days after a change, so that in the event that this kind of thing happened, it could be reclaimed with ease as soon as the GoDaddy account is in his possession.