... really did start out as a more conventional lisp, and then the syntax changed. There are plenty of functional languages that didn't descend from lisp though - notably the descendants of ISWIM. Naturally the lambda calculus predates both. Naturally. Now back to my question which is if Dylan is a Lisp thus MPS has been used in a Lisp, aren't all functional languages effectively a ...

... did start out as a more conventional lisp, and then the syntax changed. There are plenty of functional languages that didn't descend from lisp though - notably the descendants of ISWIM. Naturally the lambda calculus predates both. Or is there something different about some functional languages (Haskell?) which makes their GC requirements different? As functional languages ...