Compare and contrast: the wiki page for SR, the programming language, with, say, brainfuck. I’m of the opinion that the length and depth of a given computer-related topic’s wikipedia page is a good indicator of how useful it may be. ML just about beats Whitespace.
Lord knows a language whose main features refer to ports on NeXTs, SGI Iris’ and Decstations has to be relevant. The world has given us OCaml, Haskell and fistfulls of Lisp variants. Why the hell are we studying these unmaintained ancestors in my comparative languages course?
(Bonus points: A brainfuck interpreter written in TECO. Hah. I love you, wikipedia)