The late-2013 sales launch of Boeing‘s (NYSE: BA) 777X widebody jet was a game changer for the upper end of the commercial aircraft market. Thanks to folding wingtips and a pair of GE9X jet engines from General Electric (NYSE: GE) — the largest ever created — the massive 777X made four-engine jets obsolete virtually overnight. (This culminated in Airbus‘ decision earlier this year to start winding down production of its A380 jumbo jet.)

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