GWT is still pretty alive, too. It hasn't seen a release in a while because the developers contributing to it have been working on making it work with Google's

GWT is still pretty alive, too. It hasn't seen a release in a while because the developers contributing to it have been working on making it work with Google's recently open sourced J2CL compiler. From what I've read, builds of though are available but no official release yet. I use React and Angular these days, but even back in 2010-2011 GWT felt pretty "done". At least for the things I needed to use it for. Starting a new project with it now probably wouldn't be a career-enhancing move, but it was a pretty decent way to build really complex web apps at a time when the JS ecosystem was a lot less mature than it is now.