Every discerning tech should have a TBFOOTYSPHTOBKJIC. In fact, when supporting oddball kit, many may even have a TRFOOTYSPHTOBKJIC (That Room Full Of Old Tech You Should Probably Have Thrown Out But Kept Just In Case).
Many years back, working at a University with numerous odd labs of experimental kit to support, I had a TRFOOTYSPHTOBKJIC which came in very handy from time to time. One example was that we had two motion tracking systems (Optotrak 3020s - a £35k piece of kit). One of them was all set up with a Windows XP control PC running Matlab and worked a treat. A colleague was asked if they could get the other one working in the same way for an important experiment: "Of course, not a problem".
At least, until it turned out the second Optotrak was an older system with an ISA controller card, yet the version of Matlab we had required Windows XP. A problem given that ISA had become pretty much obsolete in the late 90s, yet XP hadn't been released until 2001. Yet, in my TRFOOTYSPHTOBKJIC, I'd retained various odd PCs of different specs, and soon managed to find an early Pentium III system that still had a lone ISA slot, yet had the performance to cope with Windows XP. Swap a bit of RAM around as well, and the motion tracker fired up just fine.