It seems to me that he's missed Teams off his list of "where this might not work for you" situations. A lot more than half my money comes from clients who know of nothing else. I'm not pleased about this, but it's another part of their grip on their more-or-less monopoly.
I would also say that the desktop version of Microsoft Outlook is much better than the web app. Can you even drag and drop emails to attach them from the web app? I never tried it. (It always bothers me that I cannot do it in Gmail. Attached emails are so common in the business world.)
Also: Almost all replacements for Excel are much worse, and incompatible with existing VBA macros that run a lot of HR, accounting, budgets, and other support functions.
Regarding Teams desktop app vs web app: Is there a big difference? I don't have experience with the web app.
Sorry, I've only just seen your response. Are you able to share your screen using FF on Linux? It's been about eighteen months since I tried so perhaps things have changed since my experience.
I'm late too, sorry but I don't have Teams meeting very frequently, only when I'm invited to one, AFAICT it works like with any other browser, I can share my screen, I see the others and they see me, etc. Nothing special really.
It worked for a long time, I've been using Linux only for the past 25 years :) The Linux version of the Teams application never worked properly OTOH.
