Since Paul wrote that, people have made so many more things part of their identity, including JavaScript which he points out in the essay was not a particularly identity-charged topic in 2009. With the rise of the frameworks, it has become an identity-charged topic with JS devs now segregated into tribes that insist on using their preferred framework for every webapp they build. It's not about assessing the right too…
I've used React, Vue, Elm, Vanilla JS, and some legacy JQuery in production over my last three years of work (along with Next, Nuxt, Gatsby, Hugo, and many others).
I thought that would make me a well rounded candidate with an understanding of different trade offs and an ability to pick up new things. Now that I'm looking for a new job though it seems like most places are looking to hire someone 100% React dev, and my history of framework diversity has become more of a liability than an asset somehow.