[racket] `def' ?

I can't say I like the idea for usability and compatibility reasons.

Usability:
 - Try this idea exaggerated: def lmbd cwcc cdr cond tgt gg param ...
   Maybe for hard core pros, but this doesn't make the language 
   very approachable for the beginners. I made a few new ones so 
   even the pros could have a taste of it :) 

Compatibility:
 - What if I'd like to run the code with a Racket a few 
   versions back? Or even dare to try it with another dialect of scheme?

What about using key shortcuts, auto completion, personal mappings 
or other IDE means to end up having in all above cases identical and
therefore compatible source code?

br, jukka