I think it's more of a case that windows is constantly writing to the disk and those processes need to stop cleanly or you'll get corruption. If it's not the swap file, it's the disk cache or the registry performance counters. Just when you think the disk has gone quiet, the indexing service kicks in!
The amiga is very "quiet" by comparison and generally only writes to the disk when you tell it to. I do remember using a disk cache app years ago where you did need to flush the buffers or something similar before switching the machine off.
