My 11 y/o desktop pc has just had a reactive servicing by me, to make the power button work again (percussive maintenance), and included an unexpected bonus challenge of gluing the DVD drive's fractured SATA data connector back together. Which it now is, aided by a decent blob of hot glue for the rest of its natural service life.

Needless to say, an extensive dust bunny colony was evicted in the process.

This exercise spanning several days, has had a positive effect on my world view.