Just my personal opinion: Racket and Gerbil Scheme are the most useful Schemes because of their fairly rich standard libraries. There are other Schemes I like to play with but I don’t do much with.
Sorry for the plug, but I wrote a Racket book last year and I am just now about 20% of the way through a Gerbil Scheme book. I have a luxury: I am retired so I can write on topics that fascinate me, even if I get small audiences.
Sorry for the plug, but I wrote a Racket book last year and I am just now about 20% of the way through a Gerbil Scheme book. I have a luxury: I am retired so I can write on topics that fascinate me, even if I get small audiences.