I think PWAs are great. I think getting content stored for offline use in the browser is wonderful (especially when you land in a country where your SIM does not work)
But in some respects - this is the old "should I build a mobile site or native app" question - just with an improved browser experience. I don't know if there is yet a definitive answer to this - it all depends on what you are trying to do. PWAs can solve a lot of your mobile needs (and cross platform to boot!) but many IDEs let you build iOS and Android from a single codebase as well.
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