IE11: yes. IE11 "integrated into anything you were using IE11 for": no. MS is working hard to make sure that it fulfills its contractual obligation with respect

IE11: yes. IE11 "integrated into anything you were using IE11 for": no. MS is working hard to make sure that it fulfills its contractual obligation with respect to IE11's EOL, but it's at the same time removing it from everywhere it was traditionally integrated so that it can die a proper death. It'll be officially supported for as long as Windows 10 is a thing, but they're going to make it as useless as possible outside of "just being an old browser that's incompatible with today's web".