DAVOS, Switzerland — Boeing is back on President Trump’s mind.

At a breakfast on Wednesday with the chief executives of major technology companies in Davos, Mr. Trump spoke at length about how technology is making things more complicated, according to four people familiar with the conversation who spoke on the condition of anonymity to describe private discussions.

As an example, he invoked Boeing, which is reeling from the biggest crisis in its history after two accidents that killed 346 people led to the grounding of its 737 Max jetliner. Mr. Trump said that the 737 was a good airplane before, but that too much software had messed it up. New software developed for the Max played a role in both crashes, in late 2018 and early 2019.

His remarks echoed thoughts he shared on Twitter just days after the second Max crash, when he said, “Airplanes are becoming far too complex to fly.”

Mr. Trump, who was attending the annual meeting of the World Economic Forum, added that automobiles had also become too complex, complaining that it used to be easier to recline seats.