If that's the nail in the coffin then why is skype still popular? The voice/video/screen share performance is consistently always bad, to the level of unusable.
It still boggles my mind that someone thought this is a good thing to do.
I read on a KB on MS site when I was trying to figure out how to change that, and it said to see if someone is online send them a message first. I'm paraphrasing of course, but I couldn't believe that that was coming from MS about something so simple as trying to figure out who is online.
Alas that that's no longer the case, we've moved all our casual chat (and voice, and video, and screenshare) to Discord and haven't looked back.