I map held Caps to Super (so I can switch windows and use other higher-than-application-level shortcuts without leaving the home row in dwm), but yes, definitely don't limit yourself to one use for your keyboard's most convenient key without a use. In X11 it's as easy as

    setxkbmap -option caps:super
    xcape -e 'Super_L=Escape'

(where setxkbmap is built into X, and xcape is a one-command install away). And IIUC you can do this with ~6 clicks in a third-party GUI like https://karabiner-elements.pqrs.org/docs/manual/configuratio... in macOS.