The specific end date isn’t really a meaningful measure, except for symbolic purposes. It’s area-under-curve that matters, or, inversely, how much is being left in the ground.
I can't imagine Peabody or Koch signing off on a 2038 deadline in the US.
...this is somewhat counter-acted by accidental leakage of methane (itself a potent greenhouse gas), but not entirely.
And 2038 isn't that far out in the future.
Also, this was the coal commission suggesting a strategy, not the government (with plenty of old ministers though). What the government is doing with this now, we'll see