Stevie's attitude

[SteveMacD]

One possibility is that Stevie feels that doing another record with this line-up now will ultimately tarnish the band's legacy, since it won't be a multi-platinum seller (the only one from this line-up not to do so).

If that's the case, I think that's a cop-out. Fleetwood Mac's commercial legacy was sealed a long time ago, but the story of the band's creative legacy is still being written. Ultimately, long after the band is gone, that's what people will remember. Just look at how popular "Tusk" has become with a generation that was either too young or not even born when it came out.