I was curious what constituted "waning", and it appears that most of the proof is that other social media platforms are growing quickly. What was interesting is that buried in the report is the Facebook ubiquity level among teams: 94%.
I'm sort of curious how any software that has that level of ubiquity could be doing anything other than "waning". It certainly can't be going up.
Also entertaining: Facebook execs called Facebooks loss of young people an "urban legend". I'm pretty sure a company that's less than 10 years old shouldn't describe anything as an urban legend.
Just for giggles, here's the growth chart: