Ironically, its user share is so small that it is surprisingly difficult to find recent statistics on exactly how small it is! It seems to be 0.64% but the desktop version is a bit higher and I’d guess TW use is also somewhat skewed towards desktop but on the other hand I’m convinced TW users are by their nature skewed to avoid IE. So my guess is that IE usage share among people reading TW’s is significantly less than 0.64%.
One approach could be to say:
“OK, MS stopped developing IE and even supporting it (June 2022). So we do serve a legacy TW version that works with it (e.g TW5.2.3), and it will always be findable but this TW version is not actively developed any more”
@jeremyruston - what are your thoughts on this?