Depends on the user’s expectations, I guess. The demo you linked does not feel close to native yet. Lots of reflows, small shifts, inconsistent rough animation… even for a web app it’s not smooth enough (iOS Safari)
If you care about UX, you should make native apps.
They're trying to make a useful app for humans, not trying to win the HackerNews Award for Excellence in UX. If accepting a little unfixable edge case jank makes their goal way easier to attain, they're going to end up with a much better app overall
This problem has been solved many times over the last decade or so. So claiming that _this_ is the future and not the more established (and smooth!) solution has to be supported by at least some evidence.
We should however be clear about our trade offs and not pretend that web apps can replace native apps.
We don’t need to pretend. Web apps must and already did replace a whole class of apps that never should’ve been native to start with.
For example: why would you even need native app for HN?
I could imagine a nice native app for Hacker News, too
Don't get me wrong, wikipedia website is also brilliant: fast and reaponsive. The app is simply adjusted to the platform it's on, including all the mobile interactions you've come to expect. For example, there's no hover on mobile. In the app I can tap-hold a link and see the preview that you see on hover on Wikipedia's site.
I’d hate to use a web app for maps, notes, document writing, IDE, messaging, etc. I always prefer a good native app to a good website.