I think Quick Look was introduced in 10.5. Offhand, can't think of new features since then that I care about. That was almost 18 years ago!<p>If I thought harder or looked at release notes, I might find something else that I care about in newer versions but nothing seems to have left much of an impression.
> A while back I took the time to upscale and hand correct all of the Mac OS X Snow Leopard 10.6 Nature backgrounds and the Abstract backgrounds to 5k for use on your Mac /iOS device for free download. Enjoy!<p>Aw man, was really hoping those links would work. Loved the Snow Leopard era.