i do not see a usecase for WordFence, we are more fan of serverside security:
DDoS protection at datacentre level.
Where Wordfence could have a use case is maybe to locate abandoned plugins, but all our sites are integrated in our MainWP install, and that doesa excellent job in located old plugins, so there is no need for wordfence.
I personally wouldn't use it, also keep in mind that the free version 30 days behond in definitions, so it feels for me like fake security. Nope i Don't use it.