I know there
have been people looking for this stuff for a long time.. After
the Lisa group purge ("A players", etc.) happened, very few people wanted to
be known as having worked on it. Even on the inside, it was tough to get
people who worked on Lisa to talk about it.
I'd presume that some of that may be NDA's.
I was a Senior Engineer at Apple for almost 20 years, first in ATG, then in
CPU Engineering, and knew most of the people still there during that time
that worked on Lisa. They didn't (and for the most part still) don't want to
talk about it.
I don't know why there should be any stigma
associated with having
worked on the Lisa project.
Don North was there earlier than I was, and worked closely with one of the
main hardware guys that didn't leave with Jobs when they formed NeXT. He
could probably answer this better than I can, but there was an attitude
internally that people who worked on Lisa worked on the 'losing' project.
This faded out as time went on, and the Mac II and Laserwriter pushed
profits up, but it was clearly still there when I started in 1986.