Seeing how well-thought-out the RVGS is, I am sure the "no system updates" stance will never come back to haunt them.
Yeah, I don't see that or "never have to patch the game" as any positives... There will always be some kind of bug, hopefully not game-crashing like we learned about for some PC Engine CDs, but yeah...
The idea that a system update or patch might some day be available is a good thing, it means that the developers care about their product or game enough to fix something when enough reports come in of a problem and that there's a free means to do so (provided you have an ISP), etc.
I get that perhaps the frequency of patching has been high on modern consoles that support it, but making that 0 and then bragging about it isn't some great solution if you ask me... :/ To think you're gonna restore the discipline of game developers who had much tougher testing cycles and programming standards in the retro days is silly as well.