As of January 12, 2016, Internet Explorer 10 is no longer supported on consumer versions of Windows (with Windows 7 users updating to IE11, and Windows 8 users upgrading to 8.1 which includes IE11). The last update was in December 2016, to fix a critical security bug.
We are beginning to face bugs due to using features that are not supported in IE10. While it is prudent to dismiss those bugs as status-declined because IE10 is outdated, this cannot be done at the moment. According to Which browsers are officially supported, and what else do I need?, IE10 is a supported browser. (It says it supports the last two major versions of every major browser, of which Internet Explorer is one. Thus, by definition, IE10 is supported.)
Should we stop supporting IE10? Does the current status of the system warrant it at the moment?
According to animuson here...
That's like saying we indefinitely support IE10 because there will never be a version 12+. Not gonna happen. [...] Otherwise it's safe to say IE10 is unsupported.
I'm loath to edit that post to say that IE10 is unsupported until I get a formal response from the team as to whether or not this should be done.