Maintained so poorly that we get this:

https://news.ycombinator.com/item?id=11165568

Skype on Linux feels a lot more like "legacy product MS inherited and then ignored" than "hot new product under active development."

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.

So basically SQL server on linux is supported until the project isn't fun to work on anymore which then it will be left to rot and eventually support dropped entirely.