[plt-scheme] Some thoughts about GC and realtime aplications

This is not a response but an encouragement:

- Scheme has been used to control Disney rides in Florida, which are as 
intensive as games I assume;
- a variant of Scheme has been used to control a real-time application 
for the military, whose identity I can't disclose;
- some OCAML guys have done real games (DOOM?), also with GC.

It is common that developers figure out for which region it is critical 
not to have GC and then disable it, roughly consistent with the idea 
that you propose. I don't think, however, people turn off GC for as 
long as what you call a level. Then again, I don't play games so what 
do I know :-)

-- Matthias