In my case I have an old Thinkpad that is chugging on reliably into its third decade soon, that ran XP when it left the factory. Newer linuxes don't work too well (accelerated graphics components such as mesa have accelerated beyond the hardware's capabilities) and the BSDs are a little spartan (very little software for i386 now for understandable reasons).

So I'm thinking of putting an XP install back on the thing with my licenced MS Office 2000 and a few other bits and pieces of software just for retro fun, and a reminder about how things were 20 years or so ago to avoid the rose tinted glasses effect.