You'll need to click on the picture to get a better view - but to date this is a comprehensvive graphic showing all social media platforms (including Blogger). How are you supposed to keep track of your updates on all of these?
I use Blogger and Linked In mostly, Twitter ocasionally and Facebook rarely. I had no idea many of these others even existed!
You'd think some might disappear in the future - but as everyone wants to make their Zuckerberg fortune, I supsect for every one that 'dies', another 7 will take their place (like the mythical Hydra!).