Once one airline offers F class on long haul they will all follow suit as they cannot afford to loose those clients to another airline, afterall 3 or 4 F class make a very large differnce to whether a route is profit or loss making route
No this is going the wrong way as the number of people doing this is quite tiny in proportion to the revenue of more Business and Economy passengers. Essentially SQ is flying fresh air and upgrades in the F cabin MAN-MUC and a few more full fare C or Y seats will do more for the bottom line than a forward cabin full of upgrades.
Impressed that they're turning a B777-300ER in 1 hour 20 mins though. Apologies if this has been posted but do passengers need to get off at Munich both ways?