Material 3 Expressive

I'm posting this here assuming I'd likely come across someone who knows this stuff.

Of all the UIs I have used, Github UI especially give me a sense of solid UI. As in there's nothing finicky about it and gives a sense of dependability (Since way before big-corp acquisition). I'm pretty sure I do not have the vocabulary to explain further.

So if anyone gets what I mean please chime in and help me understand what leads to this experience. Any related writeups/links very much appreciated.

You are just used to it. It's every bit as terrible as most web UI. It took me quite a while (coming from a different git UI) to actually figure out where to click to see a stream of commits for a branch (spoiler: the xxx commits text is secretly a button)