Skype on Linux seems to have different experiences for different people. For example it is rock solid for me, and always works well. I don't remember any crashes. But it also essentially never gets updated.
I have colleagues on Windows, Mac and iOS where skype is getting updated, but it mostly seems to frustrate them by having an unpleasant user experience. Just today I was sharing my screen but they couldn't actually find it in the skype user interface!
This is Microsoft's business to lose. But network effects mean you have to keep more of the audience satisfied because excluding people means they take themselves and those they interact with away to an alternative.