I really hate Electron, but something is so rotten under macOS that even some of Apple's own native apps are appalling. The Settings and Passwords apps are so bad as to be almost unusable, I'd love to know how and why they're that bad - are they catalyst, or just badly made?
While there are missing features (e.g. ability to merge records), I have to say that Passwords.app is worlds ahead of 1Password since their electron rewrite. System Settings is not the best (mostly because the search is broken), but Passwords is sufficiently good that I haven't bothered looking what it's written using, whereas I can immediately tell with Electron.
Some of their apps do run web views disguised as native applications—Apple Music, for instance.
Passwords works fine for me, Settings does display notorious lag loading icons, but Apple Music is by far the most disgustingly bad “native” app. Everything is slow on that one, everything takes ages to load, everything makes scrolling choke and stutter, everything even looks like a website crammed inside a desktop window, and to top it all off, the feature disparity between mobile and desktop is so large that you can still see remnants of iTunes floating around on desktop while still not being able to sync the entire condition-set of smart playlists between devices. It’s appalling.
But hey, Apple is a small company after all, they must lack the resources to make their once flagship service run decently on these powerful new chips.
They did something to Settings after MacOS Monterey that made it very slow. I miss the snappiness of the old app!