We switched to yarn in the past and switch back to NPM a couple of weeks back, after npm 5 delivered usable performance. A problem with yarn was, that it has t

We switched to yarn in the past and switch back to NPM a couple of weeks back, after npm 5 delivered usable performance. A problem with yarn was, that it has trouble upgrading all dependencies: https://github.com/yarnpkg/yarn/issues/3492 https://github.com/yarnpkg/yarn/issues/3492