OP here. Bluebird provides a lot of really useful methods and abstractions over promises that we use on a daily basis. Basically all the methods I point out in

OP here. Bluebird provides a lot of really useful methods and abstractions over promises that we use on a daily basis. Basically all the methods I point out in the article are not part of the Promise spec (and probably won't be). The other thing that Bluebird helps a lot with is providing functionality around transitioning from non-promise code to promises by providing methods such as `promisify`, `promisifyAll`, `fromCallback`, and `asCallback`.