Or, if the software doesn’t run in 64bit OS (for whatever reason) you could run a virtual machine with an OS that does (32bit Win7, 32bit XP, etc…).
Not always true. He was more correct with the ~<4gb. It depends on how many other devices are installed and would need memory allocation. I’ve seen 3.25, 3.5 and 3.75 and I’m sure others may be possible.