I didn't realize the new one was a web wrapper. I guess the point still stands though that even Apple can't be bothered to build a truly native app on their own platform.
One trend I noticed is many large software these days: Office, Adobe Suite, Spotify, Steam, Apple Store/iTunes/etc are all using web technology to build at least, their frontends.
One can't help but think, maybe web stack makes it the easiest to build good looking apps that are responsive
Another factor is that you very likely need some kind of web UI so there's a huge benefit in using web technologies across the board. Once again Apple music is a good example. They had to build a browser-based UI to keep up with the competition and once you've done that there is a strong incentive to reuse it.
The web stack has the most inertia, so its substantial and glaring flaws actually get addressed, whereas other GUI stacks change at a much slower pace (for better or worse).