Between the rounded corners that don't reach the edges of the viewport, and the behavior when opening a new app for the first time, it feels like Mac's UI is optimized around the assumption most users won't expand windows to fill the whole screen, but rather leave them half-sized somewhere in the middle. Does anyone actually do this? Especially for heavy-duty applications like my web browser and IDE, this has always…
Probably not the norm, but I use a large 4K monitor and no scaling. I haven’t maximized a window in years. They look ridiculous like that. Especially web pages with their max width set so the content is 1/4 the screen and 3/4 whitespace.
My actual biggest pet peeve with this setup is the vast number of web sites that deliberately choose to limit their content to a tiny column centered horizontally in my browser, with 10cm of wasted whitespace on each side.