When you upgrade and have been using the most recent version, it can be hard to remember what went before. However, one thing that I think changed in v.2021 was the way the Move-Copy function worked. Previously, you had to tap the control key for each iteration of a copy. In 2021, that was changed so that you only had to tap once. The howl-round was deafening though and so they changed it again. It now works the old way except that, if you tap twice, you can get multiple copies without further tapping (which I like even though many did not).
There were probably other things that I have now gotten used to but I can’t remember what they were. Probably no game changers (again!).
Oh, wait…Live Components?