Meanwhile, Garlo Nicon mined more than 60 tBTC on his CPU: https://mempool.space/testnet/address/tb1qvy67actlsslmvwpjzk9hnx6jf04g5y26sz5crx

Currently, there are less and less ASIC miners, and the real time between blocks in testnet3 is now set to 20 minutes. Sometimes, some ASIC pops out, but it is rare.