Must Chat Be Network Activated or Can It Be Activated Site By Site?

Hello All,

Have tried chat in the past and always ended up deactivating it due to poor looks and being veeeeeeeeery sluggish and unresponsive on our server.

However, the updated version look promising, so I am gonna give it another go.

My question is must it be network activated or can it be activated site-by-site?

I read all the docs, but did not see this point clarified and while it may be obvious to some, the answer eludes me.

Thanks,
Phil D