Four pounds of Keokuk chert arrived in the mail this week. The first two Holocrons shipped as well, and I'm making some small changes to the Eagle file so I can run off some more PCBs.
That's about ten thousand years of technology between those extremes. Plus I'm still practicing violin daily, an instrument which appeared in more-or-less modern form in the 16th century. Oh, but the circuit board is for a Holocron, which depending on how you look at it is either technology of the far future, or comes from "long, long ago" (in a galaxy far, far away). Except as a prop, it is only as advanced as laser cutters and the AVR chip introduced in 1996.
This weekend I mixed the final performances of an original musical based on a 19th-century fairy tale famously animated by Disney in 1937 and introducing the first of what would be a long line of Disney Princesses. This time I had a Yamaha LS9 to work on. Still no time for sound check, but I knew how to handle that now. (This was also a "blind" show in the sense that there was no proper FOH position. I mixed from inside the light booth and had to go by memory and judgement and indirect cues instead of being able to properly hear the show).
Of course I haven't used that board for at least three years. One gets rusty. I've just been asked by my work to do a little machining and I'm pretty conscious of being rusty there, too. It doesn't matter in the least what era a skill comes from, whether it is laying out traces in a CAD program or knocking chips off a rock with a deer antler. What matters is how much time has passed since you did it last.