FWIW I go between DrRacket and Sublime Text as necessary. Sublime is of course faster for typical writing & editing tasks. But when working on code-related things, the DrRacket REPL is useful.
That makes sense. I think I was using Sublime as well -- I experimented with making the world's hackiest syntax highlighting file to show embedded Pollen commands. (IIRC, Sublime was unamused with the notion of ".html.pmd" as a single extension.)
