Excellent write up, creaking old troglodyte here climbed in galiber superguides, habelar wood shanked superlights and realized early on to bring running shoes for approaches and some climbs. Then when the dynafit tlt5 came out got rid of my plastic boots, smaller profile better fit, and could ski well. Do most class 3 and low 5 with running shoes last twenty years now, your legs and feet feel fresher and I feel that well into my 60's that technology has delivered more longevity to my bliss. Like kyle there is times I want to pack running shoes, ribelles,and rock shoes for some adventures. Also a great shoe brand is inov-8, its got rubber that sticks on greasy rock and wears well. In the 90's got passed on a 18,500 glaciated pass by 17 year old sherpani carrying 60lbs smoking a cigarette and wearing chinese converse knockoffs. So sometimes yer engine and tech can only take you so far.