Looking at your tracks page, is there a part of your site that explains what the differences are between Beta and non-Beta Tracks as well as what the stage coun

Looking at your tracks page, is there a part of your site that explains what the differences are between Beta and non-Beta Tracks as well as what the stage counts signify? Or maybe just something in the FAQ that explains what your concept of a "stage" is in detail would be useful. For example, why is Rust in Beta while Go isn't despite having the same number of stages? I'm assuming the determination is made based on something else, but do you go into what that is? Rust is probably the language I'm most interested in using your site to learn and it currently has as many stages completed as Go (according to your tracks page), but you didn't mention it in your list of priority languages. Are stages user-contributed? Is that why Rust has more stages than Python or JS? Is there anything that would stop a user from using any language without major impediments or hurdles? Sorry for all the questions. I've just been really excited about seeing this platform develop!