The pics and comments don't half proove it's the squeaky wheel that gets the oil.
Machines that mess you around all the time get stripped constantly, and when you work inside you always dig out the juvenile dust bunnies (OK there's not enough static in a PC for a true dust "bunny"). Our house server ("guzunda", cos she guzunda the desk), started going a little weird after about 3 years of being untouched. When we looked at her, OMG!, the inside was dust, with some components peeking out of it. The HD's were damned near glowing hot (soon after, 2 of them blew their control boards, fortunately we have about 6 drives of this type and a board swap was performed).
It's probably why so many here are shocked at the state of them, we're all "under the bonnet" types and our fast machines are forever being opened. Much like me though, I bet those with a 2nd, dogsbody machine, let it get rightly smegged up.
Perspex side panels are good, you can't hide from the state of your machine if you can see it.