The biggest pro IMO is that you get to see how a startup is built without having to take all the risk as a founder. Not everyone is in a position to jump in to

The biggest pro IMO is that you get to see how a startup is built without having to take all the risk as a founder. Not everyone is in a position to jump in to a risk taking venture on their own, or have the ideas that lead them there. This includes not just the technology, but also a wide exposure to product, marketing, sales, finance and the investment ecosystem.