Oh yea, but I make games for a living. It's tailored for making games, and I made it to make games with. It can be used for any number of things as you suggest, but I have a goal and focus and vision and describe it according to that :)
yea, there are several engines out there! It's great. I'm glad godot exists, the more usable engines around the better I say. (Although there are many reasons people choose to use godot (or other engines) to make games over another existing engine, similar reasons exist for why I make luxe for me to use!)
2. The website mentions consoles in passing - I can't talk about them yet, but the intent is strong native console support.
3. Trivial :) The full engine is available from scripts directly (the same api that is available on the C++ side). for example: var geo = Geometry.create(Primitive.triangle, material, vert_count) and from there, you can populate the vertex buffers any way you choose. the engine provides generators (like "make me a quad" etc).
oh nice, yea it's coming along (the book is not complete yet, like before, it's written and each chapter put up when complete). There's a github repo as well.
I'd say it's worth the fun of writing your own alongside or after!
This 1.0 version of the engine is not yet available, the source will come along when it is :) (The older iterations (not representative of 1.0) source is up on the alpha page).
It's actually written in C++! wren is the scripting language on the high level, and as the site links to - later any language can be used :) I've updated the language part in the about section to clarify that.