Probably 1 in 50 searches, I find that AI adds some value. Nothing that I couldn't work around, but it can save 2 or 3 additional searches and sometimes it gives better links than the main search does.
Usually my searches are good enough to give me the answer in the first few results.
Whenever I see AI pop up and I don't need it, I just feel like it's a huge waste. I do have it turned off on DDG.