PS5 Pro is the first digital only product I've ever bought and in fairness I do own very few actual disks for the PS5 and zero for the SX. BUT I can see frustrations when it comes to digitally owned content and in particular when content could be subscription locked. Case in point. I owned the Witcher 3 digitally and had updated to the free PS5 next-gen update but I'm now unable to play it till I re-subscribe to plus (currently a little grey lock icon in the game tiles is shown).
e: I'm an idiot, I had previously purchased Witcher 3 via a US account, it launches fine under my US account but not playable under my UK one (where I played it and had my saves!) That's a new behaviour!
However, interestingly, I can launch the PS4 version of GoT, previously installed via disk without the actual need for the disc (no drive).