...apps don't use WebViews on Windows (or MacOS really, for that matter) because they are unstable APIs that Microsoft and Apple both break in nonsensical ways. It's why Electron is king, in many respects. The only desktop software that use WebViews afaik are the "native apps" which really ought to be handled with a leaner library anyways.

> App vendors will drop Safari WebKit support as soon as WKWebKit no longer mandates the site work in Safari WebKit.

Some will. Wanna guess why?