Has this become common? I’ve been developing “modern web” SPAs for years now and still never load scripts from 3rd parties. Maybe I don’t understand the meaning of “modern web” in this context?
This advice is now obsolete, because it was realised sharing caches between sites was a privacy problem. Evil.com can request example.com/logo.png and if it loads instantly, know that you've visited example.com before.
Someone even came up with a standard for "subresource integrity" [1] where you could specify a checksum of the thing you were importing from a CDN, so it couldn't be replaced by an evil CDN. I don't believe it ever achieved widespread use.
[1] https://developer.mozilla.org/en-US/docs/Web/Security/Subres...
That's of course not the whole web, but it's a huge chunk. If you do anything that does not require ad funding, you have a much easier time to do without 3rd party JS.
https://almanac.httparchive.org/en/2019/third-parties
It's over 90%
Hm, maybe you and I are reading this differently, but I read it as not using React or Angular or Ember or Vue or jQuery or whatever is fashionable until next Tuesday. You don't eschew all of those as well do you?
Most meaningful analytics don't need these trackers. They can be done server-side with info you already have such as orders, logins, active users. If an investor bases their decision primarily based on how many users Google Analytics reports the probably aren't the most critical.