It says "popular mobile and desktop browsers" but doesn't include the most popular desktop browser, Chrome? I know it has Chrome for Android, but desktop Chrome supports some extra stuff (Shared Workers, File System Access API) which makes it basically the best browser for PWAs. Feels like that level of popularity and quality should be represented somewhere.

Biggest problem for me as a PWA dev is how eager mobile browsers are to delete your local data, which is not part of this scorecard. I guess that's tricky to quantify, but basically they all suck but Safari sucks more.