This really doen’t respond directly to the question that opened this thread, but . . ..
I’ve not missed the old stone shelter atop Mt. Marcy, which was removed in the late 1960s or very early 1970s. And somehow, I never found the leanto at Lake Tear very attractive, either.
But I always wanted to (yet never did) spend a night at Plateau leanto, which certainly had one of the most spectacular views in the Adirondacks -- right up at Marcy’s dome. The view from Plateau was even better, in my mind, than from the leanto that stood atop Indian Falls, where I did stay a few times, and the one at Beaver Point on Lake Colden. Maybe the high elevation ambience added to Plateau’s appeal, too.
G.