It does look like they are not wanting to make the remotes and wanting to move to using your phone or tablet to control trains with, which for someone like me just getting setup in O scale will leave me without a remote. Phone control is ok but I would rather have a remote.
As posted above the Cab1L is still being made. I'm not sure it's a matter of wanting to make a Cab3 Hardware remote but able. Just too much changing too quickly IMO.