No, no you don't
> the browser is the jvm of a web app, very secure and js engines like V8 is extremely capable
And what this has to do with apps and the fact that web apps are universally slow, bloated, underperforming, and require significantly more resources to do the most primitive things than native apps?
> you should also make yourself familiar with webassembly tech
Same question as above
> some folks use even node.js on the server side...
Some folks use even java server side... this surely means we have an abundance of amazing great apps written in Java?
> the js UI model is also very good
There's literally no UI model in Javascript.
> there will be a great competition and in those areas where native has competitive edge, it will win
There will be no competition because lazy people and people who have never seen the world outside their web bubble will simply opt for the cheapest option.