I was only 7 years old when Rumours came out, and 9 when Tusk made it's debut, and although the hit songs were in heavy rotation on the radio, I really have no specific memory of the time.
Conversely, I was a senior in high school when Tango hit the airwaves... and all of a sudden Fleetwood Mac was Everywhere again. (pun intentional...

) With the fledgling MTV, we kinda' had a front-row seat to the drama that ensued when Buckingham quit the band right before the tour.
I guess over the next decades their fan base dwindled but I remained fascinated with McVie's style, just as consistent through the less successful incarnations that followed Tango, with Burnette, Vito, Mason, Bramlett, just as efficient as with the early blues band days with Green, Kirwan, Spencer, Welch.
Obviously I'm too much of a fan to do much objective criticism, but the last two shows I've seen, dude never missed a lick... pounded it solid for 2-1/2 hours, tipped his hat to the crowd, and went home. Class act.

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And yeah, Mick and Stevie do that every night, after Fleetwood introduces the entire staff of support musicians, and stage crew. I never had the sense it was anything less than genuine.