you have to press 2 buttons to enter "!" symbol, in the same time, for example, Google Chrome has search shortcuts without "!"
maybe Kagi can make "!" symbol optional as well?
https://support.google.com/chrome/answer/95426
so user will deside if he want to use "y Ocean" request to search "Ocean" in youtube instead of "!y Ocean"
'quick bangs' (under Settings - Search - General): just '20 allowed maximum'