As long as I have everyone's attention....check out my sound cloud!
Just kidding.
More seriously, Musk is already backpedalling on these bans and I expect he will try and retcon them into suspensions. But from a technical standpoint there is a big difference between the two.
1/
(because Im still more comfortable with breaking up my thoughts like this)
Suspensions simply block a user's access to their account.
Bans hide everything the user contributed to the site. Bots and journalists are very prolific tweeters and their tweets tend to garner a lot of engagement. Hiding all that content is resource intensive.
Restoring it is equally intensive.
Pre-Musk twitter could handle the load well enough.
2/
Musk's Twitter is operating with a skeleton crew.
Additionally, while there have been large scale purges of user accounts in the past I don't know of any large scale restorations. Restoring content will likely cause its own brand of chaos (database conflicts; server crashes).
Chaos that the remaining staff may not be able to manage.