The real success of the software was in pioneering revolutionary interfaces, deeper concepts of realtime interaction, and aethetic designs of organic shapes, rounded edges, soft shadows and layers which are now many years later standard parts of OSX and XP.
Most early Macheads will remember the crazy interfaces he built for Kai's Power Tools (KPT) -- a series of effect plug-ins for Photoshop. Here's KPT convolver as an example:
Pretty advanced for 1992.
He has basically vanished for five years. Totally disappeared. Hidden in a towering castle in Germany working on a "mysterious project."
His website, ByteBurg.de is pretty much bare, except for two doors. When you click on the door with the American flag, there's a small passage of text that reads:
Clicking on the German door yields a lot more information. Check in out in Google translate. (thanks to Ad Astra in the TalkBack).
I wonder what he's been up too, and can't wait to find out.