Thanks, that's interesting. I can see why it's easier for him to tweet in that case. But still doesn't change the fact that an article is easier to consume for the reader.
And yeah, you're right, it's definitely easier for the reader, but the author isn't required to make it easy for their audience -- if it was, Judith Butler wouldn't Judith...Butle and James Joyce wouldn't James Joyce. Foone writes tweets, 149k people have chosen to read their tweets. Personally, while I agree a blog'd be nice, I'm just glad foone makes their knowledge available.