Interesting. I switched to the Mac in 2005, and what I missed the most was the fact that in windows you could double click an image and then tap the left and right keys to browse other photos in the same folder. I learned objective c and made an app for it back then, but never published. I guess the jpegview fulfilled a similar purpose.

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pwython 2 days ago | parent [-]

I switched to Mac in 2008. I forget if the featured existed back then, but today on macOS if you press spacebar on an image in Finder to preview, you can use the arrow keys to browse other photos.

	▲	mabedan 2 days ago \| parent [-]
		Right. They introduced quick look soon after, but still not ideal. If you interact with the finder in any way, “quicklooked” item changes.