Due to IRROPS one time, I was in a middle regular Y seat and there where 4 seats Left in C+ but they were all middles. I got to the gate while they were boarding Zone 1 and I noticed that none of the top 4 people on the list cleared to C+ (I was #7 ) and I asked the GA why and he told me only middle seats where left (this was before the aisle/middle only option) and said that most people don’t want middles and like aisles/windows in regular Y. I told him I am already in a middle Y seat and will take a middle C+ seat. He says okay and puts me in 10D (on a 717) which made the experience a little bit more bearable.