I'm surprised no one has mentioned my favorite aspect of Promise, which is the fact that you can plop a .catch at the end of a chain and it will do the error ha

I'm surprised no one has mentioned my favorite aspect of Promise, which is the fact that you can plop a .catch at the end of a chain and it will do the error handling there regardless of where in the chain it failed. Doing this with long chains of asynchronous calls before Promise was a huge pain in the ass.