I see both sides of this issue, but have to come down on the side of placing KIRO on FM. With PPM, the struggle for younger demos and the future, they had no other choice.
Nevertheless, as a creature of habit, I definitely prefer the AM dial. Voices sound so much warmer without the awful pre-emphasis of FM. Until recently, I never ventured out of the AM dial for listening (even though I have worked at some FM stations in the past.) I still prefer AM, but I have to admit, I am in the minority.
I was talking to my wife the other day(we've been married a few months now, so she's not been around me nor radio for long, and is several years younger than I am)and she seemed to personify her generation's view of AM. She asked me why I bothered to tune into AM, "when it sounds so awful, is full of static, plays awful music and is only heard for short distances!" I wanted to cry! I have spent the majority of my career at AM facilities, am an avid DX'er, and simply prefer its sound! But my friends, her view represents what the majority of the 35 and younger crowd believes. You can thank the FCC for not instituting an AM Stereo mandate and giving the green light to an inferior digital system known as I-BUZZ, I mean, IBOC, which denigrates the sound even further. You can also thank the manufacturers for awful AM tuners. At any rate, the band is all but dead. Yes, I still work for an AM (albeit do some FM news as well), but reality is reality. It is inescapable.