Great stuff in this release.
Also thanks to the influx of former Unity users a lot of tools / modules / templates have been given a shot in the arm and the general maturity of Godot has increased a great deal recently. Its not yet at a level that some people would want, but its great to see progress.
The addition of hot reload of extensions finally makes C++ programming on the new Godot bearable. It was a deal breaker when I touched the game engine from 4.1 and this release delievered exactly what I wanted.
The editor restarts fast enough that, for me, it was a tolerable part of the iteration process. But yeah this is a massive improvement; GDExtension is a really important part of what makes Godot attractive for serious game development.
Is support for webgames/HTML5 fully re-added yet? It's hard to tell, as few things have been announced on it, and the lack of webgame questions on the forum about 4.x is not reassuring.
I was looking into the state of that in the last week or so and I believe the answer is: not really, it's still generally recommended to use the LTS version (3) for projects targeting web/HTML5.
I think its worth it. Godot is an excellent game engine / community / project / software. And you can do whatever you want[0] with it and its source code with no chance of having that taken away from you.
I doubt Unity is going to disappear any time soon, but they are doing a pretty good job of demonstrating the benefits of free software.
[0] obviously the MIT license does technically come with some conditions
