A nice recent example is "smooshgate", wherein it was determined that breaking websites with an older version of Mootools installed was not an acceptable way to move the web forward, so we got `Array.prototype.flat` instead of `Array.prototype.flatten`: https://news.ycombinator.com/item?id=17141024

> I don't recall a part of the web where browser developers were viewed as not having agency

Being a servant isn't "not having agency", it's "who do I exercise my agency on behalf of". Tools don't have agency, servants do.

I think you're reading way too much into that. For one thing, that's a proposal for Javascript, whose controlling body is TC39. For another, this was a bog standard example of a draft proposal where a bug was discovered, and rollout was adjusted. If that's having a "servant-oriented mindset", so do 99% of software projects.