I do not intend on making a poll, but only to discuss the topic.
Lately, Boeing has been reducing the number of engine choices on their aircraft. For the 787, there are only 2 engine choices, GE or RR. For the 777-200LR, 777-300ER, and 747-8, there is only 1 engine choice, GE. GE really does seem to be Boeing's preferred engine manufacturer. The last aircraft in Boeing's lineup that offered three engine choices were the 777-200A and 777-200ER. Why would Boeing do this? If the 787 were offered with P&W engines, I am pretty sure Northwest would have went with P&W over RR.
What about on future aircraft? Unless GE, RR, or P&W decides to work solo on the engines for Y1/737RS, I think it will be offered with only one or two engine options, most likely CFM and/or IAE. Y3, however, could be a greater chance for three engine manufactuers. For an all-new large aircraft, I am pretty sure airlines would want more than one engine manufacturer.
Any thoughts on this?