I have a somewhat funny anecdote on this. One of our sister cities had a tool for handling city-water or something along those lines, that was build in ASP Web-forms.

All the city engineers were perfectly happy with it, but the developers behind it were worried that ASP web forms were becoming obsolete. Not really an illegitimate concern I supposed, but what they did was hire a company to rebuild it in AngularJS.

So now they have a technology nobody else uses around here, while web forms simply turtles on because of how much legacy it has in various places that aren’t upgrading it.