For me, LispM was half-way down a world-falling-apart backwards-life nightmare. Something very vaguely like: It started happy with a "dancing code" dream, sort of group-collaborative VR-ish with AI. But became things-going-increasingly-badly, with (an old side project's) laptop with camera tracking, VR, and keyboard as multitouch surface, initially working well (mine didn't) but increasingly broken, with full-speed fan hiss (did). Then a hissing-vent MIT office with Symbolics but a space cadet keyboard - "I want this to be fun ... but it's so very clunky". Then IBM PC but C++ and sad baffled "it's not working?!?" no multiple dispatch (pet peeve). Then the hiss and "chunk, chunk chunk chunk" of a (high-school) IBM card punch - "I don't want to do this anymore". Sigh. Then waking up from the nightmare... but only part way.

> GNU Mes

For browsing, here's (a random fork of) mescc[1] and mes[2].

[1] https://github.com/oriansj/mes-m2/tree/master/module/mescc [2] https://github.com/oriansj/mes-m2/tree/master/src