His answer: "Because they couldn't find room for a fourth one."
If you want a 4-engine-business-jet, buy a 747-XXX.....
The Falconīs are just fine with three.....
Pilots love them, Owners love them because of operational costs....
Comparing a ( for example ) 7X with a GLEX or a 550 is comparing apples with oranges....all beautiful aircraft, but all different....so please no Falcon/GLEX/550 bashing