There's been a bunch of quality of life improvements over the years. Dark mode, file renaming by clicking the window title, Mission Control is more feature rich

There's been a bunch of quality of life improvements over the years. Dark mode, file renaming by clicking the window title, Mission Control is more feature rich than Exposé, Desktop Stacks, native notifications come to mind. There's been a lot of practical security improvements too, with the permissions system and FileVault full disk encryption. By nearly all accounts APFS is a much better file system than HFS. There's a lot to be said for Snow Leopard's simplicity and refined design, and plenty to complain about in Big Sur. But there have certainly been some improvements over the past 10 years. Even for grey beards, I'd say.