We will be dropping support for IE 9 and IE 10 in SC/SCA 20.1 – customers should have received a PFCN about it. Microsoft stopped providing security updates for IE 9 in 2016, and stopped IE 10 updates in January.

What happens if someone navigates to a 2020.1 SCA site with IE then?

Bill Gates turns up at their house and gives them stern words of admonishment.

That's awesome! Can we patch that on 2019.2?

For real, though, I can't tell. We're not testing it because we don't support it.

We have been testing an extension to show a ribbon when the user agent is IE. That would be useful if you are no longer supporting it

Nice