Abelson mentions a for LISP-chip/machine that was more parallelized(yeah spell that) than an ordinary chip.

What was the advantage/disadvantage with LISP-based machines?

They were more expensive I have heard, but why? Harder to make because they needed more parallelisation or just because there was less demand for them?

Are new multicore computers more like LISP-machines were?

Some relevant links: http://pt.withy.org/publications/LispM.html http://fare.tunes.org/LispM.html http://www.ugcs.caltech.edu/~weel/lispm.php http://en.wikipedia.org/wiki/Lisp_machines This is cool, didnt know of it before: http://en.wikipedia.org/wiki/Tagged_architecture