Another thing you might choose to do is run another (closer) descendant of one the last MIT AI Lab versions of Lisp machine system software, pieced together from tape backups of the AI Lab. Like Plan 9, the community seems to have spun itself its own living distro, still running on MIT CADR simulators. [1], [2].

[1] https://tumbleweed.nu/lm-3/

[2] https://metebalci.com/blog/cadr-lisp-machine-and-cadr-proces...