Incorrect. If Sony went out of business tomorrow, I can still play PSN digital games.
Plus not to mention that PSN digital games can be downloaded illegally through special ROM sites (although I probably shouldn't say here where to get them). So these games can be played either on jailbroken hardware or via emulation far into the future.
Once stadia dies, those games are gone for good.
I was talking about the subscription model of paying for individual games, whilst also having a monthly fee. You're discussing streaming as a technology, which as I said isn't for anyone who is a afraid of being locked out of content in 5 years. But if someone doesn't want to spend $299 on hardware just to play a few games, this is a good solution for them.