This is excellent news, and also quite timely! I am working on a side project where I want to build an exokernel, and recently (earlier this week, in fact) I decided to use Pre-Scheme as a base for implementing this exokernel and other low-level libraries that handle functionality such as memory management. Eventually I want to be able to host a language like Common Lisp, or at the bare minimum, something like Self (which can be thought of as Smalltalk without classes; see https://selflanguage.org/) on top of Pre-Scheme. This is all part of explorations of how to build a modern OS inspired by the Lisp and Smalltalk environments of the 1980s but updated to address modern concerns such as security and multi-core processors.