1) Yeah, that's why I want to have the full version as well for people with iridium throats.
2) I'm not even talking about leaving out a line. I'm just looking at the difference between the relatively easy: "Yes, 'tis Mabel," and: "There will never be a day when I won't think of you," and the rather more challenging: "Yes, 'tis Ma-a-a-a-a-a-a-a-a-a-a-a-a-a-a-aaaaaaaaaa-aaaaaaaaa-aaaaaaaaa-aaaaaaaaaa-aaaaaaaaaa-beeeeeeellllllllll," and: "There will never be a day when I won't think o-o-o-o-o-o-ooo-o-o-o-o-o-o-ooo-o-o-o-o-o-o-ooo-oooooooooooooOOOOOOOOOOOOOOOOooooooooooooooooOOOOO OOOOOoooooooooooooof yooooouuuuu." That's why I linked the vids. They were supposed to illustrate the different deliveries of the same line.
For another, check out Charlotte Church singing "Oh, come, all ye faithful," on the Dream A Dream album, back when she didn't smoke and had the voice of an angel rather than the voice of Lee Marvin. She starts at 0:48. Compare her track to the chorus who are following the sheet music after about 2:23. In that case, you'd have the choice of singing her blue lead line or the sensible brown harmony line for your awesomes, but the triple would be hard to get and Mabel's song isn't one you get to sing in harmony. It's the answer to "Oh, is there not one maiden breast?" and it begins with "Yes, ONE!" It's a solo. Bad Sableagle! No easy harmony line for you.