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Keyboard conventions do come and go but muscle memory is expensive to reprogram. Your hands are also irreplaceable. So I go for the most efficient that's not too radically unfamiliar or painful.

And honestly one could spend a career learning every editor/IDE in depth without ever accomplishing anything else. Embedded is especially bad as one often must use the IDE integrated into the platform's SDK.

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I think you missed the point where they mentioned you can change any and all keybindings in Emacs.

Right but that requires learning Emacs well enough to change bindings. Then all the other tweaks one makes to a tool like text expansions, macros, and learning differences in find-replace, refactoring, and autocomplete.

There's no more learning required for changing Emacs keybindings than in other IDEs. If you don't want to go the scripting way, you can use the Customize interface, which is Emacs's equivalent of Settings dialog in most other software. Hell, unlike most software, Customize interface gives you a choice between applying changes temporarily and permanently, so you can try things out and if you mess up, just restart the editor.

(Under the hood, stuff you change via Customize gets serialized into a file called custom.el. But you don't have to know that to use it.)

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