Now that I read @EliteStarServices, whose experience with the save/update function mirrors mine exactly, I can see that I was probably reporting the same problem earlier, except that I was associating it with Shield Security Plugin’s decision no longer to support CP.
I also wrote in that post that “the odd thing about the page-update saving (after edits) is that it comes and goes . . . But the recent issue with sluggishness has occurred only since I upgraded to 2.2.0 — and [yet] today . . . the page-updates are generally normal, i.e., faster than during the odd sluggish period of this past week or so.”
Although I, too, have just learned to live with these intermittent issues, I’m pretty sure they started with CP 2.2.0 and that the problem with Shield was a different issue entirely.
I’m on Firefox and MacOS 12.7.6