You would need standard form factors. Like my ATX tower computer case, which hosted a grand total of three different motherboards before I ended up with some free cap-rot era Dell workstations. After re-capping their boards, I discovered they were not ATX compliant, and couldn't be moved to any other case. My high-quality ATX case thus sits idle, awaiting the day when I get a new board for my newer mini-ITX case, and make it my backup machine.

Those non-standard Dell cases and power supplies will go into the trash.