It doesn't make sense at all. Mining machines are just about efficiency not type. You can get sha256 by hand. Old version ASIC miner is worse than new version ASIC.
CPU mining doesn't make network decentralized. Instead, it can make network more centralized. Imagine Monero's value going up and then, Google data center and AWS mines Monero. Big-tech already has huge CPU power.
What has more potential for decentralization? Limited supply ASICs that cost thousands of dollars to even get started or the ubiquity of CPUs that every pleb has all around us?
There are 2 major ASIC manufacturers that have a stranglehold over new supply, KYC your ass, and know exactly why you're using them. You get the sloppy seconds after they've been using them for a year if you're lucky. Then your non existent hash power is eclipsed by corporate mining farms and two mining pools that make up ~58% of blocks
The situation is not very different for you
Oh and those pools are already starting to censor, nice
