This is the focus of my latest Rethinking Communications column on TMCnet. It's actually a continuation of other recent posts asking "why?" about other tools we use for work, and my intent is to pose some questions to reconsider their true value.
I hope you give it a read - and perhaps my earlier columns too - and would love to hear your thoughts on whether UC is still worth using - or not. There's usually a short registration process on their site to access the article - let me know if any difficulty and happy to get it to you another way.