Kenwood Kitchenaid-type thing. Pretty heavy duty, because it's mostly used for bread dough.
I learned to make breads without it and still occasionally do (well... Mostly when I'm somewhere else, I guess), and there is nothing wrong with kneading by hand.
It's just so much more convenient and so much less cleanup to let the machine do it. Especially the cleanup part is huge.
Planning to host a Nix caching server, and have CI build all package and NixOS outputs on every push to git, then in turn pushing the output artifacts to the cache. Would save me a good chunk of time when tinkering with VMs that haven't seen manual updates in a while.
Only thing is, I'm not sure how to approach building and caching NixOS configs that receive agenix secrets in their input. Obviously those should not be cached...