Facebook, Twitter, etc. have their respective usage.
I use Facebook to communicate, present or share my photos PRIVATELY. This feature is not available on Steemit. So, I stick it out with Facebook but not totally.
I am more of a Twitter fan too. I use Twitter as an alternative to Google Search. I discovered money making sites thru Twitter using hashtags and I promote Steemit posts (mine and other's) oftentimes on Twitter. :)
Yup. It really depends on how we use the site. But most of the people spend hours on these sites being unproductive. I am not against these social media sites. Steemit being decentralized will not permit us to share things privately reason why I am not asking anyone to ditch the sites mentioned. This is to invite them and introduce what I see on Steemit which makes it special compared to the other sites.