E.g I can’t do timezone conversions with Kagi. I know I could just use an app for this, but it’s far quicker to type “10:30am EST to IST” into my browser’s address bar than to reach for yet another app.
Another thing Kagi doesn’t do yet is currency conversion. Once again, it might be easier/more accurate to use an app for this, but I usually just need a ballpark conversion and searching Google is quicker than using an app.
I live in India but my clients are often in the US. I also have a lot of friends/family living across the world. I suspect I do timezone/currency conversions roughly 8-10 times during a regular work day. This is why I still end up on Google Search despite not liking that company or their software one bit.