Can’t do a lot up high during the Bicknell’s Thrush time frame… it makes sense operationally. You don’t want a lift replacement at that elevation to start off behind schedule either. You know issues will crop up over the summer and fall too, these lift replacements are tough. If they decided it was not possible to complete on time without cutting the current season short, it’s a sound long-game plan.
I just imagine if a Vail-owned mountain did this (announce days prior a main lift closure, stopping summit access, especially ahead of the eclipse)… would be a bloodbath.