I think even though Max isn't written for threads and isn't threadsafe, threads could be used in a couple of places if you're very careful, and file loading is probably one of those places.
Mark's understandably reluctant to add official threaded file loading support to Max, because of the support nightmare that would create, but that doesn't mean that 3rd-party mods can't be created and used.
Mark's understandably reluctant to add official threaded file loading support to Max, because of the support nightmare that would create, but that doesn't mean that 3rd-party mods can't be created and used.