I wish such companies would publicize the fact that they're still in that state. It speaks very poorly of their commitment to business security.
I know very well, being in that business, that it takes a lot of time, effort, and money to rewrite a big business application or website for portability once it's been written for IE. Maybe Microsoft could set up a fund that companies could request and tap for help in cutting loose from IE. :-)
Anyway, if I knew which companies were still in that state, I would make a point of avoiding their web sites and web services. It's freakin' 2020. There is simply no excuse for Internet Explorer being used anywhere but in a museum of Early Internet Curiosities.