That's the wrong framing. The NOx and SOx emissions were going to have to go eventually. It's true that it might have been better to phase it out over a year or two so it was less of a shock as the hard deadline that ended up hapenning, but we couldn't keep constantly polluting forever (which is the only way to keep those aerosols in the air).

Sulphur regulations just unmasked some of the global warming that had already happened, but that masking was only ever going to be temporary in the long run.

I'm surprised I don't see that discussed more. Too easy to slide into denialism? I thought there was a strong case a lot of the immediate ocean temperature changes these past few years was this. Which is not to deny climate change, but we should pay attention to all changes. Instead, I've seen more denial that cloud seeding could do anything.