Always forward, Jim
I don't want to bring up the "increased performance" argument. I mean, we're using LabVIEW after all. Nobody who's using LabVIEW can seriously play the performance card.
I regularly see VIPM using over 1GB of memory and sometimes crashing with an "out of memory" error - although that might be due to the ridiculous 4GB of total memory available on that machine. How long before that goes to 2GB, 3GB?
We've had 64bit on windows for 15 years now. I think it's time to move on. At least give us the option. Surely VIPM isn't depending on modules that don't exist in 64b