Shares of Google parent Alphabet tumbled Wednesday after its key partner Apple indicated Google’s days of search engine dominance on Apple devices may be numbered, causing Google stock to limp toward one of its largest losses ever,

That prospect is also what has prompted Google to turn itself into an AI company, by turning conventional searches into queries it answers with its Gemini AI engine. Early stumbles in those efforts generated a lot of mockery — see glue pizza — but Google has stuck with it, insisting that users like the results.

Shares in Google parent Alphabet plunged more than eight percent on Wednesday after Apple executive Eddy Cue testified in federal court that Google's search traffic on Apple devices declined last month for the first time in over two decades.