Is that true on the pro? I trialed one maybe a year ago and got the impression that the company had stopped supporting third party devs.

I got a remarkable 2 roughly when it was released and as far as I can tell the company never supported third party devs. They gave you root access but no relevant source code...

Really quite disappointing, the device could have been a lot more useful with even a tiny bit of energy spent releasing source code for things they already developed.