One good reason is to learn different ways of doing things. I think the best way to understand why something is the way it is is to look at different ways it co

One good reason is to learn different ways of doing things. I think the best way to understand why something is the way it is is to look at different ways it could be done and what are the pro/cons of it. I've seen many times that trying and understanding a new framework leads to me implementing something in a better way in a framework I was already using.