Patrick Steinhardt [off-list ref] writes:
I was wondering whether we might want to mark the new command as
experimental at first to allow us to iterate, but the last set of
commands where we have done so are still experimental many years after
they have been introduced. So... probably not a good idea.
I am not sure if I agree. Anybody who wants any of these commands
that are marked as experimental to be declared stable can propose
to do so with a reasonable timeline attached.