[ozim]

Let’s be honest: “desktop-only” is usually an excuse to skip performance discipline entirely

No, it is excuse not to invest money in places where users won't pay.

For questions about mobile - yeah we get requests for showing it on mobile but app in app store is hard requirement, because of discoverability. People know how to install app from app store and then they have icon. Making PWA icon is still too much work for normal people.

I would need "add to home screen" button in my website that I could have user making icon with single click, then I could go with PWA.