No. Its fair big data actually. Around 55M tweets per day currently, although it wasn't actually always that big. Maybe that doesn't sound that big, but its at least a few terabytes of data.

I think this is big for a few reasons. One, if its in the LoC then it is (probably) available to the public. Previously it wasn't. That's pretty big.

Also with the LoC having a public archive of it, we can keep better track of politicians who post things online- always a good thing since occasionally they shift their positions or outright lie.

As a data analyst, I'm really excited.