I've got a slide rule that belonged to my great grandfather, who was an architect. Been thinking of actually learning how to use one, I'll probably order a new one to keep the heirloom one in good condition.
On the flip side of that, today's tradesmen usually just leave their tape measures out in the rain and mud. Seen it twice now just in my own garden (garden office built in January, and home extensions now in July). Disposable culture!
For anything else it's trivial to check if there's any discrepancy, and for casual use it might not even matter.
Slide rulers are pretty easy to use, and make.
This Illustrated Self-Guided Course On How To Use The Slide Rule [1] seems reasonable.