The things I was wondering about were: 1) can a non spa chat client be as good as a spa. 2) at what point is a spa justified. (is chat enough?)
Phone calls and live streams are things for which a tab needs to stay open. If you want to do other things simultaneously both the browser and the OS could facilitate it - but do so rather poorly.
It's not why people make spa's it seems?
No, I mean discord. An application where you can chat, recieve phone calls and watch a live stream all at the same time.
A pure html chat client is uninteresting - there have been realtime html chat clients since I was teenager, even before the release of jquery.