I don't know if you folks read Dad Hacker but he worked on porting CP/M-68k and GEM to the Atari ST. It is a great insight to the hurried and 'slap this thing together' attitude Jack had to getting the ST out the door. Pretty interesting. Check it out here:
Part 1: http://www.dadhacker.com/blog/?p=995
Part 2: http://www.dadhacker.com/blog/?p=1000
All his articles on Atari:
http://www.dadhacker.com/blog/?s=atari+st
Didn't sound like the Atari chaps had any fun at all - stress, fear, anger, frustration. What horrible foundations to build a computer on.
The Amiga was a different tale, and it shows.