It's where the world is going. Most people really don't think into the future beyond a few years. I won't buy digital until they've actually dealt with digital management of content/ownership. If I can't own something, I don't buy it.
And yes, I understand I don't own the data on the games. But, I own the item itself which contains the game that will last years. It's not dependent on servers being online and HDDs not crashing. I always make sure the games I buy play/operate without updates.
And yes, I know modern systems are basically computers and the next generations will be backwards compatible(more than likely). That's not the point as I'd just use my PC for digital. When consoles go digital, I'm out. I have no plans on buying an X or next Xbox. I won't support gamepass or forced digital.
As for why Sony is still doing great with physical media....that's a good question if true. After owning all the consoles this generation(Wii U, Xbox One, PS4 Pro, Switch), I would say the PS4 feels the most like a gaming console. Most games play pretty quickly compared to the dumpster fire Xbox that takes hours to download a game. The OS feels like a game console and the store isn't that pushy unlike the Microsoft store. With the Xbox, if it dies I'll probably trade in the games and replace them with PS4 versions. I don't mind the graphics will take a slight hit, that's not the point of owning a console. It's ease of use and great games. Nintendo is Nintendo.
Forget the next generation... the current one offers a lot of conflicting media issues: if the current Sony/MS consoles just use discs for install, and are still heavily reliant on servers, is there an advantage to having discs? I want there to be one, but I'm struggling to see it.