Both my laptops are really slow to start up and generate the tracks. I also have Dell mini form factor that is a little faster but still to slow. My home pc is a high end gaming pc that is fast. But it's monster pc with 16gig of RAM 6 core cpu, nVidia GPU ect...
The fact that we are having a debate over 32 bit vs 64 in this day and age is just stupid. Even if there were no improvements at all, BIAB should still have a 64 bit option so that it can take advantage of memory, cpu and OS compatibility and improvements and any number of other improvements and features that may arise in the future.