There are still companies in Europe I work with that use IE11.
Since we switched from jQuery to Vue last year, we put a friendly reminder on each page saying IE11 is not supported (since its ES6 support sucks), but the tickets still came in. Finally we installed a header on all B2B sites that pops a modal error saying please don't use IE11. The tickets stopped abruptly. I was expecting complaints, but the majority of them already have alt browsers installed, so instead of asking, in this case forcing them to use a different browser worked much better.
Won't this be great when Google and everyone else kills off the user agent header? 5 years from now, there'll be no forcing/detecting users with old ipads, chromebooks or phones.
Does it matter that newer browser versions are freezing the user agent? Microsoft will never remove it from IE11, so you can always detect IE to show a modal popup.
Since we switched from jQuery to Vue last year, we put a friendly reminder on each page saying IE11 is not supported (since its ES6 support sucks), but the tickets still came in. Finally we installed a header on all B2B sites that pops a modal error saying please don't use IE11. The tickets stopped abruptly. I was expecting complaints, but the majority of them already have alt browsers installed, so instead of asking, in this case forcing them to use a different browser worked much better.