I had done that previously, but our outfit is pretty much set up to automatically update "everything" when any new releases or fixes are announced, and that "Switch to Classic" option seems to have gone away.
However, from my computer(s), it now appears that the problem, along with some other petty, but severely annoying bugs have now been corrected.
With a deep dive into settings, I pretty much have Outlook working in a convenient and reliable fashion, and I sincerely hope others are having the same experience. The only complaint I have with Outlook at this point is that I would like it to launch on start up. I think that's possible, but haven't had time to figure out how to make it happen.