I don’t think most modern file systems have any limit to the depth of nested directories, that’s not how directory trees work. There are other limits like the number of objects in the file system. The ability to reference an arbitrary path is is defined by PATH_MAX, which is the maximum string length. You can still access paths longer than string length, just not in a single string representation.

Isn't there a max filepath length? Or does find not ever deal with that and just deal in terms of building its own stack of inodes or something like that?