That's not a fix. Its a shitty hack that's likely to cause all sorts of weird issues on a per-title basis.
We're talking about simple single-threaded applications likely to be using vsync as a time-base for certain functions. You cannot simply assume 50/60hz is freely interchangeable, even if in many cases it is possible. Emulators get away with it because there's no specific warranty or expectation of flawless performance.
The worst part being that if I title was initially properly re-optimized for PAL its going to be impacted worse than if it was simply left as-is from the NTSC build.
Many emulators have a "60Hz patch for PAL games", and there were boot leader cds for PS and PS2 that turned pal games into 60Hz games that did work well in all games where I used it. So it must be something very simple that in most cases should work. But yes, the best would be to test it on a per game base and use it only in the cases where it makes sense: games made in USA or Japan (not in Europe) originally made for NTSC and later ported to PAL where they added something that makes worth to choose the PAL version instead of the NTSC one, like localization to more countries.
Yeah but the problem is that the masses don't know shit, most people don't know what is possible or what they may or may not be missing compared to more advanced emulation on PC. I bet most people emulating PS1 on PC are still using epsxe.
I would hope Sony to implement those features not because people are clamoring for it, but because they want a great product they can market and sell a service on.
Well, to be exact emulation is to keep the games exactly as they were. Extra enhacements to make the game look better than they originally were are a separated thing from emulation. But yes, let's hope they keep updating their PS1 emulation to add more stuff that would help the games look better. I assume that if PS1 games in PS4 and PS5 sell well and/or Premium becomes very popular or they see there's enough demand they'll invest more there.
We know that at least they are listening and taking steps: they did release a couple of updates for the PS1 emualtor and tried (and failed) to make a 60Hz patch for PAL games, and in addition to this they also mentioned that plan to release the NTSC version in Europe for most upcoming titles. So who knows, maybe they listed and adress more related related topics.
I'd also love to see extra/better CRT filters like the ones available in Retroarch.