As much as I want a new Mac album, it might be nice for both Lindsey and Stevie to stretch their solo wings again, before reconvening with Fleetwood Mac.
I know some disagree, but I still think that both Lindsey
and Stevie have certain types of songs that are best-suited for their solo albums (though that line has been blurred even more these days, with the inclusion of "Running Through The Garden," "Murrow," "Illume" and "Come" on 'SYW')... and I'm sure they have a desire to continue with those areas of expression.
Going back and forth between their solo careers and Fleetwood Mac, they can have the best of both worlds.
Let's just hope it doesn't take them forever to come back to The Mac!