system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What’s the difference between a 32 and 64 bit processor and why we can’t just jump to a 128 but processor?
gpt
Having more bits means that a processor can work on larger numbers and allocate larger amounts of memory.

32-bit processors are limited to about 4gb of RAM while 64-bit processors can theoretically address up to 16 exabytes of RAM.

32-bit means that a microprocessor can execute 4 bytes of data in one instruction cycle while 64-bit means that a microprocessor can execute 8 bytes of data in one instruction cycle.

The reason we haven't designed a 128-bit processor is because there is no practical reason for doubling the basic register size.  At this time we don't need that much more RAM or instruction size.

So we totally could go to 128 bits, but there's no point because would have no practical purpose for it. At least not yet.