It would be very difficult to open something like Mount Ellen on short notice. That's 6 lifties (3 each for GMX and Summit), 4 patrollers absolute minimum (more like 6), lift mechanic, lift supervisor, lodge staffing, etc. Not even Killington has that many people sitting around waiting for the call or floating staff to reshuffle.
If they decided to shutter Ellen midweek (they never will, not sure why there is even discussion), it is a decision that will likely stick. There is plenty of terrain to be had on a pow day at Lincoln.
It's a drawn out hypothetical at this point. Practically, I bet SB is now more likely to operate all week at ME because they probably feel compelled to put their best foot forward to compete within the Vail/Ikon superpass landscape. The reason it's come up is because I mentioned it as part of a long list of places with 1k+ vertical in the Northeast that likely lose money on their midweek operations and could potentially be closed a few days midweek to boost profit for SB overall. Initially, it was a fun hypothetical on my end, but I'm now exhausted by it and am pulling away from this one.