Adding more and more stuff to
#stdlib just because they are generic doesn't help anyone. If you grow a lib too much, you have problems with discovery. I still find new useful functions after nearly 2 years of using K. I have a bunch of extensions for collections so generic, that I would expect them to be, but they were not in
#stdlib. You may always create a library and upload it to jcenter/mavenCentral if you feel many can benefit from it. (e.g.
https://github.com/evanchooly/manhattan)