[handrous]

> Yarn blew NPM away on speed with more features and nicer developer workflow.

I dunno if it's still true, but for years into people saying "LOL use yarn, it's a better replacement for NPM" it was still really easy to find packages that broke under Yarn because it lacked some feature or other, or was skipping some obviously-a-good-idea sanity check that NPM did and so crashed rather than proceeding after adjusting its approach, or to venture slightly off the happy path of doing "yarn install" and running into features that yarn didn't support, but NPM did. A venture into the issue tracker in that time period was enlightening, and I don't just mean the sheer count, but digging into some of the issues and why they were happening.

[EDIT] in fact, in the agency I was at at the time, a kind of joke developed that a project wasn't fully underway until you'd been forced to replace Yarn with NPM.