Like Florida Steve, been on Autocad since 2.6 I think (early 80's). I also came up from a drafting board. I remember needing to upgrade my 286 by adding a math-coprocessor. Those were exciting times.
Still running version 14. Love it, I am fast at it, and have no real reason to change. Still does the job. I've gotta get with the times however, and spend more time on Solidworks. I do mechanical design (automation machinery)
OP, sorry no answer either.