I use CachyOS on my X220 with btrfs and lzo as disk compression (lzo is very good on old cpus and makes the SSD go really fast). But I think any distro could be good on that hardware.
As a side note, I would really like an x86_64-v2 distro, people jumped from no additional instructions to v3 in no time, but these thinkpads and older pcs could really shine with that kind of optimization.
I use CachyOS on my X220 with btrfs and lzo as disk compression (lzo is very good on old cpus and makes the SSD go really fast). But I think any distro could be good on that hardware.
As a side note, I would really like an x86_64-v2 distro, people jumped from no additional instructions to v3 in no time, but these thinkpads and older pcs could really shine with that kind of optimization.