OpenNext does model [0] incremental static regeneration, but beyond that I actually don't know, or at least don't recall. OpenNext doesn't do per-route lambdas like vercel does, so it's not like you get any behavior differences there.
I _think_ you can get scale to zero on Lambda by deploying a docker container, too.
It seems like using serverless containers would meet most of the same objectives so I'm not clear where the delineation is here.