Notice how they moved the ok & cancel buttons to the bottom right since it’s the more logical location to put them.

Meanwhile gtk now puts those on opposite sides of the window title bar by default.

Separating them is good for avoiding misclicks.

Decades ago, MacOS properly had the close box for windows on the opposite side from minimize etc. widgets; now the one destructive window action could be reasonably safe without confirmation. Then Windows started gaining popularity and nobody ever did it the right way by default again. A pity for the sharp minds at Xerox PARC.