Well, if it requires regular additional work, then it is probably not worth it. In addition to memory handling, there is a layer WoW that has to work for Win32 to run of Win64. Yes it works OK but Win64 native apps can run without this layer.
But overall OK, if Win32 is preferred version now then we can let it be. Maybe in the future 32 bit Win will be greatly diminished and thus only x64 can be offered.