Source is KeplerL2, who is generally considered a reliable source for insider hardware info, particularly on AMD GPU hardware and AMD SoC for consoles.
Previously I would have personally estimated Steam Deck 2 to release mid 2026-early 2027, but the recent info about an upcoming Steam Machine made me think that maybe I should push back that estimate.
Of course even if we assume this is reliable insider info, a lot can change in couple years, so things can definitely change.
I have yet to see another manufacturer adopt the Steam Deck format. I mean, sure, it’s great and all that there are options with more powerful hardware out there, but I find the lack of trackpads or asymmetrical analogue sticks an instant turn-off.
Qnd then there is price. Price is also a rather big factor.