Flutter is the default choice for future Ubuntu apps (opens in new tab)

Flutter team member here. Yes you can! In fact, Flutter's design is layered in order to allow developers to customize it at whatever layer works for them. So in addition to being able to use Cupertino widgets out of the box (as referenced in another reply), you can also design your own widget look-and-feel if needed by extending the "widgets" library.

Yes! Flutter already supports iOS design with Cupertino widgets. It’s meant to be customizable so I’m sure other themes exist.

Oh, on Linux, Flutter apps will have the default Ubuntu theme.

We don't pull any resources from Google (or any of the other companies who contribute to Flutter, like Microsoft, Cannonical, Nevercode, etc) at runtime.

During development time we pull binaries from Google servers (for lack of a better place to put them mostly) and source from GitHub, and as Tim said there's some analytics (there's a big message saying how to opt of analytics when you first start the flutter command line tool).

I know the web site says Flutter is "made by Google" but that's really underselling how much Flutter is a group effort by lots of contributors, a (very active) minority of which happen to work for Google.

The whole project is open source, there's no closed-source component, and lots of people build their own binaries, for what it's worth. So you don't have to trust me on any of this. :-)

Disclosure: I'm on the Flutter team.

We capture a small amount of analytics from the developer tool itself, primarily to help us spot and fix crashes as well as to help us improve the tooling. Completely anonymous, we prompt you on installation, and you can disable it completely using the command 'flutter config --no-analytics'.

Flutter does not capture or upload any information from users running apps compiled with it. The SDK is all open source, of course, so you can see exactly what we do upload.

It is not much of a question of what's wrong with GTK, Qt, etc.

Flutter is cross-platform. Canonical is doing the work for Linux. Toyota is doing the work for embedded devices (to use in their cars). Microsoft is doing the work for their foldable tablets. At the moment, Flutter has the momentum to be the UI for everything. Whether it will pan out, we will be here to see.

Bad choice, but logic is easy to understand. Gtk was killing Ubuntu, and they chose to be killed by Flutter instead.

The bad about what Gtk is now is it has turned from the "Gimp Toolkit" to "GNOME Toolkit" with upstream thinking that's how it's supposed to be, and unwilling to rectify.

Flutter being a mess as it is, comes after it completely, inherently unsuitable for Linux, and desktop use.

Maybe Canonical is planning a mobile reentry.

That's setting the bar really low.

fuchsia was never anunced but have more devs now than befor is not easy make a fucking os, i think you can test in some laptop, if they want somthing usfull need at least 5 to 10 more years of development. I think the first we can see whit fuchsia will be iot device.