Make that two of us. Enter is too easy to fumble-press while having tens or hundreds of files selected, so it’s better to have that hooked to something inconsequential and easily reversible. By comparison Command-O is much harder to press unintentionally.

Also if I recall correctly, enter to rename has been Mac convention since the beginning, making it not wrong but just different.

Ok, step back a bit... I have a file selected, I have a key called 'enter' - if I press 'enter' what would you expect to happen? I'd expect to 'enter' the file - by opening it or 'entering' the file. I wouldn't expect it to 'enter a new name', because that's an editing function.

Now, my mac has enter marked as 'return'. Let's follow the same logic, assume I have a file selected, what should 'return' on a file do? Return it to where?

I see the logic, but in my opinion fumbles with this shortcut are catastrophic enough (sitting there waiting for N files to open in however many apps so they can all be closed) that the “logical” option shouldn’t necessarily be favored. That said, the alternative doesn’t necessarily have to be Command-O (though I like the mnemonics of that), some other modifier paired with return/enter could work too, but I really don’t think it should be a single key shortcut.

The key is Return. It's always been called Return on Macs (AFAIK). "Return to rename" is just a convention, and it doesn't make sense, but calling the key Enter and not making a distinction between Return and Enter is a Windowsism, just like expecting Ctrl + C to work, the semaphore to be on the right side of the window and — for the longest time — expecting the green dot to "maximize" the app (since changed from Zoom to Fullscreen).

The button is labeled “Return” on Macs. You certainly don’t expect that button to navigate back..

Cmd+Down is more generic. It’s the “enter” (as in “go into”) to Cmd+Up’s “leave” / “go out of.”

Enter = one key

Cmd+whatever = annoying chord.