The instructor was praising how VB programmers didn't need to worry about the memory they take up with their programs, basing his opinion on the amount of memory modern desktop systems have.

The instructor is an idiot. A programmer should always keep in mind how much memory and CPU time their code is going to use -- an eighteen wheeler is not required to move a carton of milk home from the corner store.

Would this instructor read a 40G log file into memory before processing it? I sure hope not. Unless, of course, s/he was being facetious.