You can read a fresh interview at KVR with one of the founding fathers of Propellerhead Software: Ernst Nathorst-Böös. I did the sound design for many of the sounds included in the Factory SoundBank which comes with the Reason software of Propellerhead. In 2005 I visited the Propellerhead office, Stockholm, Sweden. Then I also met Ernst and we stayed in contact ever since.
I probably would not have started my own company Melodiefabriek if I hadn’t bought Reason 1.0 back in 2001. I continu being a fan of Reason. Maybe you’re a fan too. If so, look at this screenshot of prehistoric Reason design which KvK published with the interview: