Yeah, that makes sense. There are definitely different types of side projects, not all are "startups". Also, I don't think doing a start-up on the side is bad i

Yeah, that makes sense. There are definitely different types of side projects, not all are "startups". Also, I don't think doing a start-up on the side is bad if you work at a job that is 9-5. But this guy is saying dedicate to whatever you really care about- you should be working on at most one "startup" at a time if you would like to create a "startup" in the traditional sense.