Gah! I don't want to change my default search engine on all my machines temporarily and then have to change them back once the outage is resolved. Because I know that due to inertia, I won't do it until Google results start bothering me again (that won't be long - hah!).
I type searches in my URL bar across multiple machine and mobile devices dozens of times an hour during "heads down" times.
May I suggest (if browser extension apis allow this) for the extension to fall back to google (or whatever was configured before kagi) if a response from Kagi is not received in some timeout seconds.