I'll quote you again in 4 years.
For not owning a PS5 and only owning a Switch, you seem to get very much buttblasted at the prospect of Sony tapping out
It always comes back to "exclusives". Just 10 years ago there were still a lot of games coming out on Sony systems that nobody expected would hit PC, yet things have shifted a lot since then. Mostly the Japanese market losing it's fear of developing to PC indirectly killed Sony's grip of exclusives. Nips were not going to develop in the gaijinbox and Nintendo's prior consoles were either underpowered, had a meager install base or both, so the only real option was Sony. Those days are long gone.
The advantage of consoles is the plug and play aspect, but between consoles suddenly having more computer like problems (blue screens of death, games crashing) and PC games being simpler to set up than in older times (this isn't the same as properly optimized, mind you), both are suddenly surprisingly close.
I can count with one hand the last time I had to activelly fuck with mi PC to get a game to run in almost 10 years. Before that it was a lot more frequent and emulating anything beyond snes was a goddamn pain.
But the real killer could be what the Steamdeck started. Yes, it's a computer, I was able to setup a full emulation suite with some ingenuity (and it's still pretty simple). But if I just used it to run my steam library, it's almost stupid proof. The difference between it and a traditional console when it comes to ease of use is not that far apart.
I do think Sony will keep pushing PSN, but I don't think it will be that lucrative and something like a Stadia approach is a money vortex to setup. They could go into PC with their own version of the uplay and battlenets of the world, but that's another one I don't see achieving much.
Nintendo can stick to it's guns, they have enough of a fanbase that people are willing to put cash to keep playing their properties and release enough volume to sustain things, they have a healthy balance of small mid and high profile projects. Sony fucked itself with only releasing 3-5 year cycle games, too all in. They aren't an autism magnet like Nintendo, so even if they start going with smaller projects reviving older beloved licenses, they won't sell as consistently.