Then instead of $10/m, you have a console for 10 years ($120*10 = $1200).
Even cheaper if you go for the PS4.
Has Stadia improved since launch? The PS5 and Xbox Series X are both more powerful than Stadia instances, not to mention modern PCs. Has Google announced any timeframe for powering up their instances to match? Will I have to pay more to access instances with the power of next-generation consoles? Will those be available for all the games I purchased, or on a title-by-title basis?
That's the scary thing for some people. The 'continuous improvement' may just as well be taking away stuff you 'own' or spying on you.
Also, money you paid to stadia are just as "frozen" (spent? frozen money implies they can be thawn) as money for online service.
While you can carry chromecast ultra with you it's PITA to setup - you have to configure the network on it and a controller. Without wired connection it's not a good experience. Meanwhile, ps5 you just plug in a play for the most part.
The easiest users to steal from the console market are the ones that buy only 1 or 2 console games which are traditionally reserved for those consoles (NFL Madden is the latest promotion and a good example). For these users, there is massive experience shift going from buying a ps4, ps online, just to play the same game all the time. I am one of these users. If they can find these 1 or 2 games that activate each segment of users, they will take cohorts from the console market. This won't get the entire console gamer market, but it's a great place to start.