Native mobile apps thrive despite this magical web browser working everywhere, because the web browser simply doesn't do what native apps do. You may enjoy that, but a million businesses and billions of users out there don't agree, because they use native apps. There were 255 billion native mobile app downloads in 2022, generating billions in revenue. That's not a mistake or accident; that's a market filling a need.
If we really want an application platform that works everywhere, then let's stop dicking around with these stupid document hypertext viewers and build a real app platform that works everywhere.