Klaus Schulze, who WAY BACK was with Tangerine Dream and Ash Ra Tempel, has been a solo performer for decades. The following two clips show you what kind of differences and similarities over 30 years of evolution makes. You'll probably find the clips similar on a surface listen, but listen to tonal quality and the style of layering employed.
I would expect you to listen to 30 minutes' worth of the two clips, but by jumping around you should be able to see and hear some real differences in technology and real similarities in style even with the new tools.