3D Printed Models
Fortunately part of the transition was going from paper to a 2D CAD. The next step was bigger, 2D to 3D ("wire frame"). Then came 3D "solids" which was a major hurdle back in the 1990's. The programs were clumsy and expensive and usually required upper end hardware to run on.
I retired in 1997 and skipping forward two decades 3D modeling was somewhere between free to a affordable price for the home user. One didn't need a higher end computer and the printers for home use also became affordable.
I use a free, no longer supported program (app) called 3DDesign by Autodesk. Quite easy to use, it is a vast improvement over the clumsy parametric solids modeling of 30 years ago (yikes!!!).
As for the expense, if you already have a decent PC you are more than half way there. A decent lower end printer can be purchased for about $US 500.
My 3D system allows me to make things I could not do with a few hand tools and a large assortment of wood pieces... and faster!
Now I know that this is not everyone's cup of tea, but I suspect it might not be the nightmare some think it is.
Lew