Random Thoughts 81 - The Rise of 'Off Of'

81. The Rise of "Off Of"

Recently, I noticed that, more and more, the two words "off of" are being used together to replace other words, as if this is the new fashion or trend in modern English language. I want to give a couple of examples and see if someone else is making the same observation.

First, I noticed that people would say "based off of (this data set)". Interesting. What's wrong with "based on"? Or since when did "based on" lose its favor?

Second, I was reading some post online, which has this line "Finding that you have been left off of email strings, and occasional meeting invites..." What about "left out of"?

I'm by no means a linguist, but this does interest me. Does anyone has some clue on this, or off of this?

S.D
2014.7.20