Nah it never catches on because of a combination of momentum, esoterica, being more difficult to learn due to having more discrete functions in the stl. And then there is the fact that it's pretty dated, so lots of people come to CL, get mad about it's warts and then become compiler writers.

I say this as somebody that loves CL dearly. The difference between princ, prin1 and print; set, setf and setq; =, eq, eql, equal and equalp is more than most programmers can be bothered to memorize.