I'd like to point out that you can compile and run nwserver+nwnx2 on a 64 bit userspace with ease, as long as you have the proper multiarch compiler suite for compiling, and the required libs for running it. The only known (to me) issue is that libq-dev on debian has a dependency bug that would make it pull in a 32bit postgres server too.
Note that nwserver being a 32bit binary adding a metric ton of RAM will not improve matters. No matter how much address space you offer, nwserver will not use more than 32bit of it. That said, nwserver doesn't need much RAM either. You run into cpu limitations far earlier than memory pressure (nwnx_jvm and similar hogs nonwithstanding) unless you are very careful with spreading out AI updates. '>