I still have a couple of SuperMicro 760T cases from 2001 (?) in use today. One houses an ESXi server on an x79 board and the other is Linux on a Threadripper 1900x. I really do like the old cases. I wish I had some metal working skillz to mod them into something interesting.I've never really had much of a desire to change cases. My antec P182 still works just fine as do my almost as old Fractal cases
