[flavio81]

>It’s really interesting reading about LISP machines but no-one’s building a new one

There have been two open source Lisp Machine OS created in the last 15 or 10 years.

However a big part of the power of the Symbolics/LMI machines was in the software itself (applications), and this is still propietary code.

To reimplement the Lisp Machine applications would take quite a big effort.

[amszmidt]

The LMI and MIT Lisp Machine source code is not proprietary since about 10 and 20 years respectively.