> Furthermore, either Common Lisp is Common Lisp, or not. Not really. Currently the most Common Lisp is SBCL. There is software out there and the probability o

> Furthermore, either Common Lisp is Common Lisp, or not. Not really. Currently the most Common Lisp is SBCL. There is software out there and the probability of being able to run it on a Lisp implementation depends on its compatibility (and the effort that has been taken to make it compatible). Medley is very different from most other Lisps, even from other Lisp Machines, so it would be interesting how get software in and out of it, make it compatible, etc. Actual software depends on more than just 'Common Lisp' (which itself has a lot of differences between implementations): file system, I/O system, characters, networking, threading, FFI, TCO, ... Lisp Machines have a very different operating system and very different development environments. Lots of basic assumptions don't apply there. > why should there be no effort to make Medley modern There is already some. We'll see what it brings. > Anyway, I like to go back into the roads not taken, to at least partially re-branch from there. There is much to learn from. From that what we have now, not so much. Even though the past stuff interest me (and I remember a time, when there were active Lisp Machine users around), I learn a lot from stuff we have now, too.