I saw that - and it doesn't seem to fit the bill. First, Dart is a language, not a GUI toolkit; and Flutter seems to be focused on Dart. It also seems to be opinionated in other ways in the introduction, rather than exemplifying its flexibility and adaptability to _your_ platform, programming language etc. Most importantly, it seems it will get you to produce apps whose UI fits a mobile phone rather than a desktop. I also get the sense that Google has strong control over this project.
Maybe I'm mis-perceiving - but that's the impression the flutter.dev site gives people.
Dart is the language flutter (the gui toolkit) is written in.
I've no idea what you mean regarding: "rather than exemplifying its flexibility and adaptability to _your_ platform, programming language etc".
It can produced mobile, web, or desktop apps from the same codebase... Dart and flutter are open source projects supported by Google, like android and go lang.
Seems like you're looking for excuses not to use dart/flutter. That's fine but you could just say you don't want to use them.
> Dart is the language flutter (the gui toolkit) is written in.
Well, that's already a strong barrier to its use. When creating a GUI for an app, the toolkit must offer bindings for the language you're using, it's not you that needs to learn a bespoke language just to use the toolkit.
> It can produced mobile, web, or desktop apps from the same codebase...
That's the thing - not really. It seems it can produce a web or a mobile app while will _run_ on the desktop. But mobile and web apps do _not_ work as desktop apps, nor the other way around; the whole UI/UX language is different... even if some companies try to foist mobile apps onto desktop users.
Obviously if you are unwilling to learn a new language then yes flutter is not going to do it for you. Flutter is Dart's gui framework and it's excellent. Dart however is itself a lovely language and extremely easy to pick up if you have any knowledge in programming. Much easier than learning the flutter framework to be honest.
> That's the thing - not really.
If you were to spend some time learning dart and flutter you'd know this to be false. But I'm not here to change you mind as you've already made it.