I like to make a broader point: in the sense that native apps are doomed, you could argue that web apps are doomed as well.
It’s this thing called the attention economy. People have a limited amount of time to look at apps and websites. For many, 80% of that time will be spent on apps and websites that are basically not an app or a website, they are platforms. I’m talking about Facebook, the many chat apps, Netflix, the like.
This leaves 20% (or perhaps even less) of user attention time to the whole overcrowded space of other apps and websites. It’s spread very thin, and you really have to offer unique value to engage users. This is true whether you build a native app or a website, wouldn’t you agree?