I had been using AutoCAD for some years before I switched to Linux. Then we looked into CAD software that would work on Linux and we settled on QCAD. I learned to use that (actually it's better than AutoCAD). After trying to keep/get Vista and XP running for a long time, my dad gave up and also learned to use QCAD
the fact that my dad believed he needed to install Vista to run something should not be taken as reliable evidence that doing so was in any way necessary