Definitely would be a nice add-on but there would go the competitive market pricing, I suspect. If I had the cash to throw at the issue, there is a very reasonably priced aftermarket solution for the hardware side of things.
As far as software goes, @TMToronto graced the forums with a series of build updates centered on bestowing upon his Onefinity atc capabilities using an aftermarket controller (and a literal ton of custom upgrades to the entire system). I would probably classify the entire series as being “not for the faint-of-heart” but definitely for anyone who’s thoroughly inclined to repeatedly beat their Onefinity warranty into the ground with Thor’s hammer.
Again, though, I’d suspect that this becoming an actual feature would be decided by how much someone’s willing to pay for the engineering / materials on top of the current pricing. And, again, there goes the competitive market edge.