One of our big clients is a car conpany and according to our analytics, we have more users on ie11 than firefox and that's reason enough for us to keep support for ie11, i hope we stop support before EOL, but only tine will tell.
I would love to add more links to explanation of why we should all drop support for ie11, if you have any, let me know. I have plans to add a link to meduz's site that shows the percentage of ie11 users in certain regions.
Sidenote : Canada has a relatively high ie11 userbase, so we still have to keep support
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