Yarn is generally regarded as not necessary anymore: https://medium.com/@vincentnewkirk/npm-vs-yarn-2019-e88757b1...

While hooks are generally regarded as faster, classes are actually much closer than previously though. But they still get beat out in the benchmarks: https://medium.com/@dan_abramov/this-benchmark-is-indeed-fla...

Firebase was bought by Google, which while there hasn't been anything in the news regarding Firebase, Google still collects and shares data. https://en.wikipedia.org/wiki/Privacy_concerns_regarding_Goo...

Just as a note, twice now you've said the word "generally" and provided the same link, one person's blog representing his own opinion. That's not what the word "generally" means.

You can say "one person has the opinion that Yarn is not required anymore". But saying "generally" means it's common knowledge and most people would agree with that opinion. That doesn't seem to be the case here.

"Generally" seems to be a stretch, since it's easy to find recommendations to the contrary: https://www.ryadel.com/en/yarn-vs-npm-pnpm-2019/#Verdict

You should read the last 3 paragraphs of Dan's post