Lose out, as in regular season, B12, and getting bounced in the 1st round of the tourney? If that happens then Prohm's seat would be warming rapidly next year whether it's fair or not. It's tough because many in the fan base see this as year four of Prohm's tenure while others see this as year two (because of the rebuild following the class with Monte, Naz, etc.).
At the same time, I still contend the end of the season is crucial only because there's a vocal portion of the fan base that strictly sees this as year 4 (or year 8/9 even, if they merge the Hoiberg years in as a total rebuilding period) and isn't going to be near as patient as the rest of us.