Ask anything to Sass TeamView other answers to this thread
Should browsers support
.scss in future, by-default? Will that be a good option?
No. Sass was designed to be compiled to CSS. It has proven the demand for more powerful syntax and abstractions, but the right thing to do for CSS is to design new language features that can take full advantage of the runtime nature of CSS and the document in scope. A prime example of this is CSS custom properties (CSS Variables) which inherit down the document -- a capability that Sass could never have implemented as a preprocessor and wasn't ever considered when we were designing it.