I run NCE because I bought it as part of an estate sale before I heard of RailPro. I got into RP when I was experimenting with HO battery power. So I run both, which is part of the appeal of RP -- you can run it on top of an existing DCC system. I had never (and still haven't) installed a DCC decoder, but I was up and running with RP in 20 minutes. I've posted my installs here, admittedly, older four axle diesels with basic lights and sound and none of the modern shell-full weights to work around. My layout is 20x15, and a little sound goes a long way.
I can't speak to Tim Ring's plans but it's a small business with attendant limits, I am sure. And I can relate an anecdote which some here may have heard: A friend is a well-known former editor of one of the leading hobby magazines. One day he went to the owner's wife and said there was so much more they could to make the magazine Number One in the hobby. "Did it ever occur to you," she said, "that [the owner] doesn't want to be Number One?" That's when he decided to move on.