Probably at the point when the team stops winning... While I'd love to see Carroll out of the NFC West, I expect he'll last another 4-5 years. Pete and their GM, Schneider, have built a Super Bowl-contending squad that is young and cheap at key positions. That 4-5 year projection is what I see as Carroll/Schneider's window for winning a title with "this squad," and I think Paul Allen will let them ride it out.
We'll see how it plays out...
If the failed drug tests keep piling up this is gonna blow up from the inside out and that team will self destruct. Pete has given himself no room for error because of the quality (or lack there of) people he has hitched his wagon too. They have brought in too many guys with character issues and off the field issues. It is a PED factory up there. A franchise that is out of control and we have seen this before, it never ends well. Those types of teams have a way of just self destructing over time.