I had been using DDG for a while now and sometimes still fell back on Google for searches. I would say that Kagi so far has been as good as the Google of about 2-3 years ago.

The primary reason why I switched over is the argument "nothing is free". I am hoping that paying for a search service means they'll respect my privacy. I'm on a monthly plan so at the first whiff of controversy I'm out.

So far so good, but I'm keeping an eye on it.