Bizflyer,
You may only travel on 4 engine aeroplanes but most passengers aren't even aware of what type of aircraft they are even on!
Out of interest if you booked a 747 to a destination and then, as often happens, a 777 substitution occurs what do you do?
NWSRG
Engines such as those fitted to the 777 are very much more fuel efficient than those fitted to the 747 but the maintenance costs of two engines versus four is also a large part of the equation. This makes the accountants argument for two engine aeroplanes over four unassailable.
If more people were like Bizflyer then ETOPS wouldn't exist and of course nobody would mind paying more for their tickets for the privilege!