I tried to add more product names but Bing couldn’t handle so many product names that Google has killed.
I am a victim of Google Reader, Google One VPN, Google Podcast, Picasa, Google Play Music, Google for Domains, Stadia.
Xbox gamepass does the same thing. You can play tons of xbox games in any web browser. No xbox hardware needed
Xbox Game Pass rotates games all the time. That means if I want to play a 50-hour RPG, I might have to finish the game before it gets rotated out. And Xbox doesn’t make the schedule available.
With Stadia I could purchase games and play it at my own pace, even without a subscription.
Can I Buy The Game I Play on Game Pass?
Yes, you can purchase any game available on Game Pass, which is then permanently saved to your Microsoft account as a digital game.
Though i don’t know if this means you have to pay the subscription to play it or not
AFAIK, you can purchase the games but the purchased games are only playable via Xbox/Windows.
Xcloud is limited to the games available via subscription. Unless they changed this recently.
Official Xbox FAQ says:
The games available to play with cloud gaming vary based on platform and region. You can find the latest selection of titles available for cloud gaming here: Xbox Game Pass Games Library
That means only games in the Game Pass library is playable via cloud.