As the solo founder of a couple of 'popular' websites I get asked regularly if I want to create an app. When I ask them what they want the app to do what a website can't, they can't name a single USP, especially now notifications work on all devices.

And really, who has the time to maintain a website and two apps? Or rebuild a decade old platform in a janky cross compiling solution like Flutter that is always on the brink of being sunsetted?

Not me. I'll spend that time on improving my websites, thanks. I'll let my competitors go bankrupt on trying to monetise an expensive app that should have been a website.