Changing your name after divorce, how much of a faff is it?

I’m a bit further along in the process now and starting to think about whether to change my name back. Part of me wants to just be done with it, but another part is dreading the admin.

How much actually needs changing in real life? Banks, passport, work, kids’ school, everything? And did anyone regret changing it back or not changing it back?

It feels like a small thing compared to everything else, but I’m finding it oddly emotional and I don’t want to make it harder than it needs to be. Would really appreciate hearing how others handled it.