It would be nice to toggle the auto-hide behaviour for desktop as well as edit the timeout instead of being stuck with the current 15 second timeout.
I know this is an older post and is already a future consideration, but I would like to add my vote for this to show interest. Being able to use the dock to quickly launch related apps while on my desktop would be a great help for de-cluttering my desktop.
I should note the old behaviour was "never hide unless hidden by user" on desktop
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