The commercial version, which was enhanced by Symbolics and then
"Macsyma Inc" for about 20 years, is not public. The Macsyma INc
people supported and enhanced AKCL. I do not know if their
changes to AKCL were made public, but I suspect not.
Can anyone find out?
What was the license of AKCL at the time? Did it permit them
to distribute an improved version and not release the source?
The LGPL does not permit such a thing.