Please, please, please support Emacs-style key bindings...
...at least for macOS. Virtually all macOS apps, especially those developed by Apple, support Emacs-style key binding that are incredibly useful for text navigation and text selection purposes. As an almost daily use of InDesign—and a 26-year employee of Adobe—I would very much like to see this supported. Most of the commands involve the use of the "control" key, which appears to be unused for InDesign keyboard shortcuts, so this is likely to be a no-brainer.
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Dr. Ken Lunde commented
I should also point out that Adobe FrameMaker, which is no longer supported on macOS, supports Emacs-style key bindings. I used FrameMaker before being forced to transition to InDesign over a dozen years ago.