Watching these things come and go over a long period of time the baseline scenario is a low-grade of “enshittification” in that there is a lot of expensive and boring detail work to keep the experience low friction and no vendor seems to want to do this work once it has gotten established — So inevitably it becomes a matter of “it just doesn’t work” and somebody will tell you “You gotta meet me on XYZ” and when you’re skeptical they’ll say “XYZ works as good as Zoom did back in the day” and the simple feature that the product is in the honeymoon stage and attending to all the little details and not in the harvesting stage where every developer they can let go of is profit is more important than the headliner features in which the product is really innovative.
A counter to that is that one of these companies really can decide that it wants to be permanent, to some extent Facebook has done that, they saw what happened to MySpace and Yahoo and know it will happen to them too if they don’t keep up, which has often meant buying “the next thing” and also heavy investments in what could be the next platform. To play that game takes real courage because there will come a time you need to kill your cash cow so you’ll have another cash cow, something Zuckerberg can do because he controls so much of the company.