There are roughly 495 767-300s in operation. 762s are down to around 76 btw.
Of the 495, we own 70. United 35. American 40. Two Japanese airlines account for another 77. Air Canada has 32. LATAM has 37. Then they're mostly single digits by random airlines. According to wikipedia at least.
Then the 787 has 1,300 orders. The A330 has 1,700. Both will probably grow larger.
The 321 on the bottom side of the unicorn mom jet target range comes in at 3,700+ orders. And that's before the 321LR gets going (we could get those btw) and 322 being launched (which is easy to do). The 739 didn't sell well but even it has 650ish orders. Almost 4500 jets there and Boeing only built 1000 752s. So the "replacement jets" seem to be 4.5x more popular.
So the 797 is supposed to hit a narrow window between the 321/322 and 787/332 for a few western airlines that don't want that many and do so while the 321/787/330 are available to order today with no R&D and 5 year delay on top of that?
And to top it all off Airbus is just baiting Boeing before pulling the trigger on the 322. Mean industry.
Boeing:
^^^ And they only have themselves to blame.
Airbus be like...