Are CC Libraries stable enough to rely on for building large graphic symbol libraries to be shared among teams?

I would love to build an extensive library of frequently used graphic components and paragraph styles to be shared among several colleagues and am a little concerned about the stability and logics of doing so.

For example, if I build a series of CC Library folders to be shared (via collaboration) with other co-workers using my assigned Adobe ID account and then decide at some point to leave that company to work elsewhere, what would happen to all those assets if the Adobe ID that created them is no longer active or is assigned to another user instead? Would all that content be blown away if anything changed with the original Adobe ID?

I'm also wondering if there are local copies of these files hidden somewhere which sync with the Adobe CC account? If so, where are they located?