Linux mint 32 vs 64 bit?

Question

linux

Good afternoon, I have a 32-bit mint, a 64-bit computer, 6 hectares of memory, in the future I plan to pick up more. I know perfectly well what is the difference in bitness in the system, the question is essentially this:
Why does a 32-bit mint see all 6 hectares? In theory, it should stop at 4. And if he sees everything, and (theoretically) sees more (maybe 8, maybe 16, as finances allow), is it worth switching to a 64-bit system?

Or does he simply "know" that there is more memory and will use 4?

Answer 1

PAE allows you to use more than 4GB of RAM in a 32-bit OS.

Answer 2

The main trick is that a separate process still gets 4GB of addresses.

Answer 3

64 bits is not only about memory. It's about the processor too.