If you are interested in the of how decompilers are being improved generally (which can be applied to LISP structures), recent research includes:
: An end-to-end framework using Large Language Models (LLMs) to optimize decompiler output for better readability and simplicity. To help you find exactly what you need, could you clarify: vlx decompiler better
: The essential first step. It strips the VLX container to reveal the underlying .fas (compiled Lisp) files. If you are interested in the of how