a16z GP Anish Acharya says three years ago, ideas were too ambitious. Today, they're too small. "In the old days, which is three years ago, we would see a company, and if what they were trying to do was too ambitious, we would not engage. Just too crazy, too complex." "Implied by that is you wouldn't do a $100 million seed because it's too much money for almost any problem. It's too much money for any person to actually manage... It doesn't make sense as an inception round." "Today we're…