While I agree that @Lost_My_Mind@lemmy.world’s data isn’t exactly correct in covering the percentage of games that can be played, their sentiment is not so random.

For example:

• Both the PS4 and the PS5 in the database you linked show that roughly 25-28% of games will require a patch to be played without “bugs that are either too severe or too many to provide a mostly flawless experience”. That is almost one game out of three that, without internet connection/dead servers, will live in an odd limbo in which you own a disc with unpatched/crude software. One out of ten will be useless plastic. In comparison, a GOG installer can be re-downloaded as soon as a game is patched, and you can store it away locally once again.
• Often, buying games at launch means you don’t have a complete package for the title, which nowadays comes in the form of DLCs and season passes. Those are not registered in any way onto the disc (naturally), and are only tied to your account. If Sony closes down services that check that you own such content, you don’t have access to it anymore.

One could argue that Sony’s going at great lengths to keep services alive; for example, the PS3 still lets you download and update content. One also can, however, easily imagine that there will be a day when such service is not considered profitable enough, since you soon won’t be able to buy games for it anymore. What then? Can we realistically expect Sony to keep servers and checks alive for a console that does not generate any new profit whatsoever? I honestly doubt so.