While not trying to defend library,
I had been using the word element library a lot for referring to the UI space for creating type, template, and relation a lot, so I understand why library might be a good choice for other things, but we probably have lots of word choices for rooms for creating things that we don’t have to reserve it, e.g. factory, assembly line, lab, workshop, kitchen, kiln.
btw, out of the topic, I am also curious why we need two words for channels and chat, channel is very accurate for speaking to each other, in those walkie-talkie ages 
.. especially in terms of function, we can make chat object as default homepage to make channel function like chat..