>So then why aren't PWA's super-popular on Windows and on Android? Since Safari doesn't affect those?

Says who?

"Yes, PWAs have become popular on these platforms. I work for Microsoft on the Microsoft Store (app store on Windows) and I work with the Edge team, and I work on PWABuilder.com, which publishes PWAs to app stores. Some of the most popular apps in the Microsoft Store are PWAs: Netflix, TikTok, Adobe Creative Cloud, Disney+, and many others.

To view the list of PWAs in the Store, on a Windows box you can run ms-windows-store://assoc/?Tags=AppExtension-microsoft.store.edgePWA" - https://news.ycombinator.com/item?id=46457849