@whats77inaname: I think that reflects the market pretty well. If you like to "roll your own", then RR offers a LOT of flexibility. OM offers a more stuctured environment while maintaining it's "open source" cred. Centrafuse has always been targeted more to casual users than the die-hard "hacker". Each brings different advantages and limitations to the table. The other thing to consider is that once a carPC project reaches a certain point, matures if you will, many users want to expand into more esoteric realms....Audiophile sound, advanced hardware integration, multi-user environments. That's usually the point where they begin to bump up against the limitations of a specific product (or their own knowledge and skills).
Personally, I really enjoy the problem solving aspects. Over the last two years, I've been able to run a pretty large assortment of exotic hardware and applications through my truck without negatively impacting the core functionality (Nav, XM radio, HD radio etc). I also try to maintain realistic expectations of performance and reliability. And above all, I keep in mind that IT'S A HOBBY!. It's not curing cancer or critical to ANYTHING of real importance in my life. It's just a VERY expensive toy.