Would be an amazing business that, supposing you could get buy in from a load of other firms.
I'm not a huge fan of Javascript and it's proliferation of frameworks but some of that stuff is objectively both good and useful.
Back a long time ago the applicable pejorative was "yuppie". I haven't heard that one recently. I suspect that many people reading here would have to look it up in Wikipedia.
Edit: BTW at the time I was partial to calling people "yuppie scum". Sigh. It's so hard to keep up with the changing putdowns! :)
That said, there might be a market for a web framework in PL/I there is a whole lot of IBM big iron out there :-P
Sure, C++/C/Fortran/some home grown template library is what it's built on. What would they gain by rewriting it some node framework of the week or whatever other shiny distraction? If they did do that and that caused downtime, there would be the same naysayers here complaining about that instead.