I literally have a bunch of P4s in the attic. I just try to avoid picking up any more.
If it is P3 or older or Core 2 Duo or newer, I keep it. I have just developed a distaste for P4

Except there's already hardware far more plentiful than Pentium 4s, more reliable than Pentium 4s, more efficient than Pentium 4s, and faster than Pentium 4s. I have no interest in them, and they're not even good in the first place. Core 2 being thrown out, I can see as wasteful. Pentium 3 actually has value and is actually nice.