The exact quote:
It is important to us, and we’ve tried to be really clear, we are not doing the yearly cadence. We’re not going to do a bump every year. There’s no reason to do that. And, honestly, from our perspective, that’s kind of not really fair to your customers to come out with something so soon that’s only incrementally better. So we really do want to wait for a generational leap in compute without sacrificing battery life before we ship the real second generation of Steam Deck. But it is something that we’re excited about and we’re working on.
Regarding size, the steamdeck already has an M.2 for storage, and a CAMM2 module for ram would take about the same amount of space as a second M.2 drive. The only other major thing for repairability/upgradability would be less glue on the battery and threaded inserts, which doesn’t add size.