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Three more elements to this feature request, though not sure why I'm bothering.  Clearly nobody but me wants it, so maybe I'll just switch to one of the other editors.  Surely someone makes an editor designed for developers.

1) Make the permissions less granular than a single file.  If I'm editing five files in a single directory, I don't want to enter my password for each of them.  Or just make this whole function more like sudo, where I keep my superuser privileges for a bit regardless of how many times I save a file.

2) Creating new files that requires superuser privileges doesn't work.

3) In lieu of superuser elevation, perhaps let me shift Sublime Text sideways into the role of another user, so I can edit files owned by them without the constant requirement to elevate my privileges to root.