I think they are ditching silverlight/activex. That means there are sites that will have broken features. I see it with Chrome on a lot of intranet sites.
There probably is some money to be made fixing those clunky sites. :-)
I’ve heard that Edge will not do ActiveX at all. Silverlight does not yet have a plugin and some people read that as it will not be supported. I believe Silverlight is near end of life so maybe it will be dropped as well. HTML5 is the way to go for any website or application at this time. Any HTML5 compliant apps should work on Chrome or Edge.
I work in a large corporate environment and we have moved tens of thousands of PC’s to IE 11 on Windows 7. We allow Chrome, but certify applications on IE 11. We dropped Firefox last year (thank god). I have always had memory management issues with Firefox and am not a big fan.