In some ways I'm glad that bands like Mastodon, Therapy? and Dream Theater need to tour / record / tour / record / tour record.
It almost guarantees new music regularly. If DT13 suddenly sold 30 million copies - they might start to get lazy and complacent too.
Plus - Therapy? and DT have such small gaps between releasing an album / touring / getting back into the writing process - that if you don't like one album -
- you don't have *that* long to wait until the next one.
If you didn't like "Reload" - you had to wait a further 6 years to get "St. Anger" and then another 5 for "Death Magnetic" and now another 6 years and counting...
And if you didn't like " 10,000 Days " back in 2006 well ... Bad luck