I have to use Internet Explorer at work. Those with Windows 10 machines have to use Edge. It's the only browser my company supports, so we don't really have a choice. If we want to get work done and minimize risk of failure on tasks, we have to use IE/Edge. I'm sure my company is far from the only one. It's like the Office suite. Yeah, there are free and open-source alternatives, but if you want to get work done without the risk of compatibility problems, you just use Office.
That said, I also have Chrome installed for my own personal browsing at work, because IE/Edge are miserable. But, if it's work, I gotta use IE/Edge.