In addition to making a record that was artistically challenging and not pure fluff, I think he envisioned that whole period for the band as a new productive phase that would include multiple albums and tours. A stark difference from other boomer bands falling back on the greatest hits touring model. He mentioned in Destiny Rules the attempt to "string a couple of years together" I He later revealed in other interviews down the road that he had hoped for at least one follow up album to happen in relatively quickly after SYW.
Unfortunately what really happened was a constant uphill battle to get Stevie onboard to do anything in the studio from 2004 onward. The ice cracked a little bit for the 2013 EP, but quickly turned into the stalemate situation. Luckily it gave us Buckingham McVie which is arguably stronger without Stevie (and personally, it's my theory that's what really led to the 2018 friction. Being upstaged)
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