Looking at the screenshots of Big Sur (my mac is too old to install it), I have mixed feelings. On the one hand, they're doing more skeuomorphism in some places, especially icons. But in some other places, buttons are losing borders for this godforsaken "clean" look. But I do hope that the departure of Johny Ive is going to help with them going back to a good design.
And it's very unfortunate that Apple doesn't have a visionary CEO any more. Tim Cook feels more concerned with investors than anything else.