So sad. I learned to program with my Atari 130XE, mainly in 6502 Assembly. Truly respected him and his constant engineering and entrepreneurship efforts.
The Computer History Museum interviewed him back in 2014 and posted the video on YT earlier this year: https://www.youtube.com/watch?v=enHF9lMseP8
Scene World Magazine also did an extensive interview 6 years ago: https://vimeo.com/89640027