We'll all get used to it, but it's harder now to see what is a button and what isn't, e.g. only 2 of these are clickable https://imgur.com/a/wR9xsvT

Wow, that's pretty bad. Logical consistency was clearly not a guiding principle of this redesign.

There is a consistent principle behind those choices: rectangles with slightly rounded corners are clickable, while rectangles with semicircular sides (“pills”) are not clickable. It's confusing because I've never seen another site that distinguishes clickable elements in that way, but I can imagine we'll grow to find it intuitive with enough usage.

For sure we can all learn through trial and error pretty much any UI. And I know there are complaints any time any big site tries to do a redesign.

But a good UI should be intuitive for a first time user. This seems objectively worse.

This was among the first things I noticed. Here it is with vertical lines added https://i.imgur.com/EVSTdLA.png

I felt the same, and even made the same image with vertical lines in my feedback to GitHub while the change was still in the preview stage.

I installed a custom css user style extension just to fix it. Here's a link to my comment with example before and after along with the CSS needed for chrome or firefox: https://news.ycombinator.com/item?id=23624292

The grayscale reduction and loss of contrast is a modern design anti-pattern they have adopted. Makes reading things more difficult

the alignment is so jarring its mind boggling how this got shipped.

I felt the same, I installed a custom css user style extension just to fix it. Here's a link to my comment with example before and after along with the CSS needed for chrome or firefox:

https://news.ycombinator.com/item?id=23624292