I am amazed at some of the stuff available today compared to when I was doing this 40 some odd years ago. In my opinion it has to be the internet and home computer.
I can print decals off my printer
Find out what color the transmission of a '68 Roadrunner is with a few mouse clicks
Order a model from the other side of the earth without speaking to someone
Connect with other modelers easily as I can in this forum
What are your thoughts?