I see your point, but are they under this site mercy? This site is like a directory rather than a policy maker like app stores, it wont take % of any subscription for starter plus all the pros of lower development costs and what not. Say this site suddenly decided to remove your app? So what, your users can still go to your site and have the PWA, now if Apple decided to do the same to your app, good luck getting anyone to use it. Now is PWA the ultimate replacement? Certainly not, access to hardware, performance wise, games, you will still need them, but other than that, I think it’s a step forward.