Think of it this way: If you are a small business / entrepreneur and you have a working product on one platform, you should be able to port to another platform

Think of it this way: If you are a small business / entrepreneur and you have a working product on one platform, you should be able to port to another platform with minimal effort, where you can at least have a MVP without having to recreate your front-end from scratch. - If you already have a website and you want to do an app, PWA is probably a simpler path compared to recreating your front-end in Flutter. - Likewise if you already have a working Flutter mobile app and your users start to ask for a web or desktop version, it's easy to get some sub-optimal version out with less effort if you can re-use a lot of your Flutter code. It also makes it easier to maintain if you structure your code in a way that separates out the logic that's specific to platforms. If you manage to achieve product-market fit and your business benefits from your users being first-class citizens on the web and on the phone, you can start to invest in those development teams.