Usually this kind of attitude could be justified even if it was just a shitty anecdote, but with SCSS and LESS in particular I'm afraid you've chosen long lived

Usually this kind of attitude could be justified even if it was just a shitty anecdote, but with SCSS and LESS in particular I'm afraid you've chosen long lived, bulletproofed software that has tremendous adoption and community. Neither would be what anybody would call "the tool of the month".