It exists. I’ve always thought this would be nice, now only need matching electric outhaul. So many times I stop at beach to adjust for the situation - but to do it on the fly so nice.
I figure adjusting from min to max with outhaul and downhaul is about equal to 0.5 m change in sail size?
Hopefully costs come down, and is widely adopted innovation.
https://tripledinnovations.nl/