He just said that there were a couple of games that were "glitchy" on his old SCDS2, but they run well on the SCDS2+. I personally do not have any first hand experience with the card yet. I am hoping the one I have coming from the contest arrives Soon™.
As far as if SCDS2+ will be viable in the future, I have faith in the SCDS2 team. They have the best DS cart and have remained that way because of their diligence. Even if Gateway blocks them with a cart update, the SCDS2 was updateable, so I assume the SCDS2+ is as well. I would only be scared of Gateway not implementing AP correctly and wind up with another round of Gateway related bricks. I pray they aren't stupid enough to repeat that fiasco. Even if they are, I still have my RasPi and a NAND mod...