Hacker News Reader

If you’re running Safari, right-click link → Add to Reading List. It’s site agnostic, syncs across devices, and you can even have Safari fetch and cache your reading list for offline access.

I wonder how solid that caching feature is, and whether it works for eg a JS-powered PWA that's fully client-side rendered.

Yeah, I also use it that way. If I deem it worth reading, it's damn worth my upvote.

Yes, I agree with you. However, I couldn't find any HN PWA with this feature.