Web apps and APIs are not the answer to the biggest problem we have today, which is the lack of open alternatives to Apple's App Store and Google's Play Store. While it is true that Apple cripples their browser to make web apps second-class citizens, browsers will always add a layer of indirection. Even if the performance loss were made negligible, it would encourage the creation of user interfaces that target the lowest common denominator available on all platforms.
In my opinion, the best way to fix this situation in the long-run is to design completely open mobile devices. I'd love to replace my iPhone and iPad with devices that are repairable and run a mobile-optimized version of Haiku. We're not as far off from that as you might think; metal 3D printers such as the Markforged Metal X will make it easier and cheaper than ever to make cases that turn a pile of parts into a working phone.
What does this have to do with web apps? Well, if you're spending all your time keeping up with web development, perhaps it's time to learn some new skills and push things forward in a different direction.