They could have if they'd been willing to accept a new type rating, but airlines aren't keen on retraining their 737 pilots unless they have to. Boeing's retent

They could have if they'd been willing to accept a new type rating, but airlines aren't keen on retraining their 737 pilots unless they have to. Boeing's retention of the same rating was a selling point to airlines otherwise if they're having to train people anyways maybe Airbus would be worth a look?