It is a matter of needs I believe and a very opinionated choice. I know that lodash performs better than native in some operations, but damn! Spread operator is way more elegant and safe than Object.assign, which is also offered by _.assign. .map, .filter, .reduce, .some, .every maps iterable objects and also arrays, which in some contexts is really handy and optimal, but in other contexts is misleading. Also, have you heard of Ramda? I would say, the three solutions adapt to different needs.