[lowbloodsugar]

r/nintendoswitch: 4.2m

r/ps5: 2.6m

r/steamdeck: 230k

r/stadia: 119k

What jumps out from that thread you linked is the casualness of the gamers. So not only did Google find a tiny market, but that market wasn't terribly motivated.

[MomoXenosaga]

Chasing casuals isn't a bad idea. Nintendo does it Pokémon and Animal crossing.

Stadia relied on casuals who happen to have a stable fiber optic cable internet connection.

[taeric]

Neither Pokemon nor Animal Crossing strike me as casual. I think of Candy Crush and all the games like that. Not games with a story that start off with a tutorial.

[int_19h]

It's a spectrum, not a binary. They're way more casual than, say, Half-Life or GTA.

[snapcaster]

I disagree with this use of metric completely. I game a lot, and I own multiple devices on your list above yet subscribe to 0 of the subreddits. People subscribe to the subreddits of _games_. You didn't even count /r/nintendo instead. If anything, I think the fact that these subreddits have so many people is actually a point against what you're arguing about the size of the casual market. I do agree with you on the larger point though, stadia had no product/market fit