[closeparen]

Aside from cleaning and lubrication, a lot of "doing maintenance" is still throwing away old material and bringing in new. Just being selective about exactly which part is at the end of its duty cycle.

People talk about it like there's something wrong when, at any given time, a few microservices are being rewritten. But I would expect that for a sufficiently large machine, on any given day a few parts are being replaced.