It's the "progressive" part I have a problem with. Web apps revolutionized our idea of what an application can do; everything in PWA makes web applications worse, not better.
Just to take a simple example, when I want to visit Hacker news I just type n in the address bar of my iPad and click on the auto-suggest result and I am there.
If I had an app for it, it would compete with all the other apps that have a burnt umber orange icon or that have an "H", an "N" or a "Y" as their own logo. (McDonald's might be the only brand that can pull that off) If I had an app for that I'd also be installing lots of other apps and have 4 or 5 pages of them to scroll through. If anything, brands should be asking for ways to make installed apps as easy to find as uninstalled web pages are.
(Note all the things I complained about originally except the lack of a reliable storage facility, are problems with apps. What makes it a 'side project' is that PWA advocates keep denying that "it just doesn't work" and then act incredulous that nobody wants to waste time with them.)
If anything, most app authors should just quit drinking the Kool-Aid and just make plain ordinary web applications without any of the PWA power-downs. It's like playing a Mario game and finding some mushroom that makes you smaller without any benefit (like being able to go in some hole.)