I do endpoint engineering (for a state entity no less) - it's actually end of life in February 2023 and will be patched until then - plus everyone has been told it's been deprecated for over a year now.

So what about sites that actually still need it? I only have one customer in our enterprise who absolutely requires it and it's not a government app - it's Oracle's Micros Opera Property Management System.

Even our on prem ERP (enterprise resource planner) we were able to upgrade nearly 10 years ago to support modern browsers - and this is an app that has been around since the 60s.

It's going to be fine because Microsoft Edge Enterprise Site List. The way it works is we have a policy where the clients know about certain urls to automatically enable IE mode. The end user is really not even aware it kicks off. You can read more about it here: https://learn.microsoft.com/en-us/internet-explorer/ie11-deploy-guide/what-is-enterprise-mode

You see while iexplore.exe is going away - all the api's will live in forever because there's tons of apps that use them - and you might not even know it.

Yes there are better ways of doing web content in an app in Windows like Web Edgeview, but IE compatibility will likely be with us well beyond Windows 12 and 13 - just like hta's and mfc.

So no there's zero issues for any sys admin who knows anything about Windows.