Flexibility is nice, but it implies ongoing algorithm development
Could be ongoing feature development too. The 2D is missing gamma adjustment. I figured for the price, something was missing.
One thing I can say for the Realta is that my processor (Calibre PVPRO HD) still gives the best/smoothest upscaling I've seen. That processor is 4.5 years old and has never failed to start up and run, has never crashed or locked up, and is still running the OEM firmware! More than what I can say for all the so-called "high-end" models discussed over on the LumaBay forum.