It’s often so easy not to submit these kinds of changes. But 10 years later you still don’t have them.
Seems like a long wait now but is worth it later.
That's still going to lose the long tail
Sure, then you just fall back to whatever best effort approach you were using before.
At some point, the number of people on that tail will be smaller than the number of people with an incorrectly setup $TERM, for a net gain in effective portability.