It seems crazy, but Preview is genuinely a big part of keeping me stuck in the Apple ecosystem. That iOS doesn't have anything like it is the main thing keeping me from ditching macOS for iOS (+ remote Linux VMs), even. It's a sign of how crap the UX is or has become on Windows or Linux that it's so surprising to have a basic utility program function so reliably, so well, and with such light resource use, while consistently delighting with its versatility.

I have similar feelings about their office suite. In general their add-on and utility software is just great. I'd miss all of it on any other platform (and do, when I use those—yes, even the file manager, which is still less crashy, less prone to weird interface bugginess, and more consistent than any featureful equivalent I've used on Linux, and I've used... oh, all the big ones, over the last 20 years, and I don't find it any worse than Windows Explorer, aside from preferring some of the latter's hotkeys) but of all of them... yeah, Preview may be #1, which was not something I expected when I first started using OSX/macOS about 10 years ago.

Yeah, preview for simple annotation or cropping, photopea for heavier tasks. I haven't installed 3rd party photo editors in years.