> Not sure what this means. The only support I need in an editor is the ability to use tab and shift tab on blocks of text to change the indentation level. It's visually obvious when code is correctly indented.

In Emacs you can use C-M-f and C-M-b to move back and forth over / select paren/bracket/brace delimited blocks, or in vi you can use %, both with 0 configuration in a language-unaware state. If you're editing C or Lisp or whatever, these generic commands are useful. Editors don't tend to have move-to-next-less-indented-line (and similar) commands outside of Python modes or similar, in my experience, and even if they did, they'd need a bit more work than that to work properly because of indenting subexpressions.