You are conflating revenue and yields. You understand they can not be a revenue leader while their "yeilds" [sic] aren't being "destroyed" right? Other airlines ran larger equipment pre-covid (some as big as 777 as in the case of United BOS-SFO in order to provide a decent front-of-cabin competitive product) and have much larger overhead costs on premium services that JB doesn't have. Revenue should indeed be higher if you run a 300-seat aircraft against a 160-seat aircraft.

JB's yields on premium transcon are not being destroyed by Delta, United, "ect" [sic], pre-covid obviously. In fact, one could argue the reason JB just expanded Mint to EWR-LAX/SFO is due to the yield and product advantage they have over United. I guess we can wait and see if that works out.