This may be what finally pushes me over the edge to become a normal person by finally ditching #Chez #Scheme for Racket:
"With the version 9.0 release, #Racket includes support for shared-memory threads that can take advantage of multicore hardware and OS threads to run in parallel— not merely concurrently with other Racket threads, as was the case in versions before 9.0."
https://blog.racket-lang.org/2025/11/parallel-threads.html