The official download page says "Sublime Text 3 is currently in beta" It's been like that for years. First build is from January 2013, it's almost 4 years already. I don't know what specifically is missing there, I just know I'm not comfortable using beta version (with little hope it will ever come out of beta) of a product for daily work. I see it as even developers don't consider it stable enough.

I think that sublime text 3 beta is like debian testing, they are more solid that some others lts products.

VScode and Atom are constantly receiving new features. So we can say that they are still in beta too.

Beta is just a word.