Seeing Milkboy's thread, and also considering an odd sounding voice in a recent episode, I am starting to wonder if Julie Kavner may quit the show depending on how long the show has been on and wondering if that has started to get to her.
I mean, she doesn't want to participate in "In the Flesh" recitals of episodes, and was not happy with James Lipton. Of course, when the cast was asking for a raise years ago, she was the only one who didn't really care how much she made. I mean, is she feeling like she resents ever being part of one of the greatest shows ever?
Personally, she should be happy, considering what she makes with each episode despite not playing a popular character. But it's starting to seem to me like she won't be voicing Marge much longer, and I don't know who else would.