Unsupported?

There is definitely no "myth" on the operating economics...

Annual Budget (no depreciation)

Falcon 7X/ G550

Utilization (nm.) 175,000/ 175,000
Utilization (hours) 407/ 413
Variable Cost $1,126,832/ $1,363,016
Fixed Cost $717,506/ $827,531
Total Cost $1,844,338/ $2,190,546
Per nm $10.54/ $12.52
Per hour $4,532/ $5,304
Per seat mile $0.88 / $0.70
Typical price/1000 (mil.) $47,400/ $48,995

Source: Conklin & deDecker Aircraft Cost Evaluator 2009 vol. 1 v. 4.8.0

IMHO, Dassault marketing is brilliant. They have marketed an aircraft that sells for $1,595,000 less; and in terms of an annual operating budget, an owner can utilize the 7X for 16% less than a G550.

All with an extra engine...why not market triple redundancy for less money?