Everybody knows d minor is the saddest of all keys.

You’re holding it wrong.

This is the year of the Linux desktop!

I’m also running an Ifixit battery and have had zero problems save for the original battery being DOA out of the box. 3 in a row is really bad luck.

Open core legacy patcher has kept my 2012 MBP able to run modern versions of macos (currently on latest update to Monterey). No stability issues, but AirDrop is flakey and I am no longer able to run anything in a VM using Apple’s hypervisor. It runs well; might be worth looking into for your use case.