I've been searching for hours for an answer. Such a simple thing. Huge jumble of partial answers....
Given: Large directory tree structure, folders with files, maybe some empty folders.
Challenge: Move recursively throughout tree. Delete all folders in entire tree that has in name "xyz".
There might be one such folder. There might be one hundred.
Any thoughts greatly appreciated.
(thanks @publicdomain, and others, for much help on many challenges)