When Customers Want A 777X going forward?

Boeing is stumped about who will buy the 777X going forward here are my candidates: 

 • Emerging new airlines 

 • Freight companies never considered 

 • Legacy airlines with long legs in place 

 • Expect a dozen 777X orders from emerging new Airlines like Vietnam's Bamboo 

 • Volga will order 6 and will go for the 777F 

 • American based airline who has not weighed-in like United or Delta are 6 hanging orders at this time. 

• Then 2024 is a fleet renewal for the 777-300-ER for a total 0f 20 units in play as an estimation