With automatic windows update there aren't really that many users left who are using IE version lower than 11. Browser stats metrics show that only 0.1% of all users are on IE < version 11.
IE11 13.62% IE8 2.25% IE9 1.32% IE10 1.06%
Wikimedia global all-device browsing for April says:
IE11 4.8% IE7 3.0% IE9 0.43% IE6 0.38% IE8 0.25% IE10 0.23% IE4 0.22% (! I don't know what this is about, maybe an old mobile version?)
[0] https://www.netmarketshare.com/browser-market-share.aspx?qpr...
[1] https://analytics.wikimedia.org/dashboards/browsers/#all-sit...
It's all about your own users. I'm doing UX and front-end for a company that deals with a lot of IE8 users... -_-
The ongoing theory is that they are on hacked XP copies since that traffic is coming out of China.