No IT manager would permit an unsupported browser plugin to remain deployed. Who's going to fix newly discovered exploits?
And even less something that was always intended to be a quick workaround for users under very strict (or lazy) IT organizations that didn't upgrade to a decent browser in years.
Kudos to Google for creating and supporting it, until now. Time to take off the training wheels.
Chrome for Business looks like a solid and proper upgrade path, but it does require a semi-progressive IT team.