The conventional wisdom among Michigan fans is that it's in our interests for Alabama to beat LSU, because that increases the likelihood that only one SEC team makes it into the CFP. I'd like to argue the opposite, which obviously is mainly of relevance only if we win out.
1. If Michigan wins out, they will not be left out of the CFP, no matter what. No other non-SEC conference champion will have as many victories over winning teams (>.500) than Michigan, which is apparently a key metric for the Committee (the Committee is literally not allowed to discuss things like S&P+, according to Bill Connelly).
2. If Alabama has one loss, there is at least a possibility that they lose twice, eliminating themselves from the playoff and making it more possible for someone else to win. (Alabama's remaining regular-season SEC games are against #3 LSU, #18 Miss St, and Auburn.)
3. If Alabama finishes the regular season with one loss, there is at least a possibility that they are left out of the CFP, due to the weakness of their schedule. This is an unlikely scenario, but the likely beneficiary here would be Oklahoma.
Hence, if the goal is to win the national championship, which cannot happen unless Michigan wins out, Michigan fans should root for Alabama to lose to LSU, because that would make it at least possible that Alabama could be upset twice and thereby left out of the CFP.
That's my theory and I'm sticking with it! (At least until midnight Saturday.)