The problem is that IE11 is not eol until the end of 2020, and management can be loathe to drop support for it while it still makes a blip in the traffic, even a tiny one.
It's one thing to wait for the actually supported browsers to all catch up on a new feature, but IE11 is abandonware that can't be abandoned, and the situation just keeps getting worse.
It's one thing to wait for the actually supported browsers to all catch up on a new feature, but IE11 is abandonware that can't be abandoned, and the situation just keeps getting worse.