system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why did 64-bit consoles come way before 64-bit home computers and OS's?
gpt
Because it was mostly mostly marketing hype and 64 bit sounded was better than 32 bit. None of them had more than 4 gb of memory, which is the main use for a 64 bit processor. Since consoles at that time weren't ever backwards compatible, it was no big deal to switch processors.

Home computers on the other had, people expected to be able to run their old software. It was a bunch of work to make an OS that could run 32 and 64 bit software as well as a CPU that could do the same. So it wasn't done until people really started needing more than 4 GB of ram.

You could also argue that home PCs became 64 bit in 1997 with the addition of the MMX instruction set as Intel processors started getting 64 bit registers and instructions.

Generally, consoles as soon as they had one 64 bit feature, they were advertised as 64 bit. Home PCs didn't get called 64 bit until every feature was 64 bit.