Using older versions of Outlook for Mac in business environments
I actually switched the Show as Conversations view off sometime last week because I was losing my mind trying to find the most recent email in a "conversation." For me at least, that action had no impact on the downloading situation for most folders. I still have several folders with just a fraction of the emails that belong in them, and the "Load more conversations" nonsense if I scroll down far enough. I just re-tested the downloading (opening) of emails in my inbox, and that appears to be working now, so I'll keep an eye on it.
The calendar doesn't even remotely resemble my calendar in legacy Outlook and in fact, I've had to return to the old version more than once to grab repeating dates (birthdays, etc.) that didn't transfer, and add them back in manually. It's a concern, because I don't know everything that didn't transfer over from the legacy calendar to the new one. I also have several calendars now that I don't believe was the case with the old Outlook, which is taking some getting used to. There are 4 under my exchange account, and 3 under my Yahoo account. I probably did that to myself after upgrading my Macbooks over the years, but now I'm constantly clicking from one calendar to the next trying to find the one I've been updating. Another thing I noticed is the color coding went away. There's a color scheme of some sort, but it's not user driven. And the repeating events are unnecessarily glitchy to set up, imo.
I get the sense that some people used the hell out of all or most of legacy Outlook's features, whereas others (like me) never reached that level, and in my case, I think it's a stumbling block to using the new version efficiently. That said, I also think MS could've done a much better job. I don't see any advantage to the new version over the old one, only drawbacks, and that shouldn't be the case for any of us, regardless of how we used the legacy version.