[Haskell-cafe] How much of Haskell was possible 20 years ago?

Hi, I like Haskell, and use it as my main language. However, compiling a Haskell program usually takes a lot of memory and CPU. So I was curious, and would like to know from computer scholars in this list: how much of Haskell would be possible in machines with really low CPU and memory? Which features would be feasible for a compiler to implement, and for programmers to use? Thanks, Maurício