If David O. was still around he'd be saying how YMLF holds its own against the best of what Gershwin or Porter had to offer - and how it leads the way to the studio perfection of Gypsy. No arguments whatsoever from me.
Chris says on the Rumours DVD-A that this is mainly her arrangement and that only the chorus that diverts from the groove was one of Lindsey's arrangement ideas. This be true, her keyboards truly drive the track forward. I love the Rosebud doc version with the extra vocals at the end and Stevie fooling around with a guiro. Her best instrumental contribution to Fleetwood Mac for sure - she could've been the world's best guiroist if she hadn't stopped playing it!
A great song in the live environment as well with powerful plucky solos from Lindsey around 1980-1982.