I don't know why so many DDG users use '!g' unless they're using Edge or just aren't aware that Chromium and Firefox both let you create an arbitrary keyword like 'g' for a search provider, which is a lot easier to type.
Some of the other bang commands do look useful, though.
Guess I have a "localized" deformation as french keyboard include a ! character accessible without any key modifier, so it's actually pretty straightforward to use.
Some of the other bang commands do look useful, though.