What does HackerNews think of browser-compat-data?
This repository contains compatibility data for Web technologies as displayed on MDN
It's an Eleventy widget powered by MDN's browser-compat-data: https://github.com/mdn/browser-compat-data.
We only got working IndexedDB as of Safari 10 and Service Workers in Safari 11, both multiple years after support landed in stable Firefox. There's no support for WebXR, Web Push, or WebAuthn. Safari still can't display WebP images, show WebM (VP8/9) movies, or play Opus-formatted sound. Safari doesn't understand the current version of referrer-policy headers. Safari doesn't implement the String.prototype.matchAll() method. There's no support for getDisplayMedia(). Depending on how you count, we've been waiting seven years for getUserMedia() in Safari, and it's still not fully functional. Safari can't animate changes to CSS grid template rows/columns, or use overflow-inline / overflow-block media queries.
...it's a big weird grab bag of features, but a broad surface area nevertheless. And you have to wonder if some fringe APIs wouldn't be more popular if we could actually compete on bringing the full Web platform to iOS devices in a timely manner.