If most readers of danluu don’t find that, then yes!

I mean, if it really bothers you you could fairly trivially apply picocss or whatever to it using a user stylesheet. That is so little effort that calling it working for free would be disingenuous to say the least.

Multiple people, me being the third or fourth, are not feeling the default layout and you all read that as a signal it's working as intended?

No, just that it’s easy to change for those that don’t like it. Clearly some people do like it (including Dan, presumably).

For people in the future who want to apply the centered viewport classless version of Pico CSS, just apply the following in Firefox's Style Editor (F12 to open DevTools, then click on Style Editor; click on the + sign to add a new style):

  @import url("https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.classless.min.css");

I honestly did not know that until I took about 5-10 minutes looking up how to apply arbitrary styles in Firefox.

Browser vendors have really dropped the ball in supporting CSS, which is no doubt how we get comments like the above. Firefox is likely the least-worst offender, but as you point out still needlessly complicated for what CSS considers to be a foundational feature.

CSS is explicitly designed for you to apply your own user stylesheet. That is exactly what it envisions you doing. If you don't like web technologies you might want to question what you are doing on the web. However, the web also encourages sharing, so no, theoretically once one user has created a user stylesheet they would share it with others so there would be no need for everyone to create their own, unless they had alternative tastes.

Actions speak louder than words.