[TeMPOraL]

Mass is a tradeoff too, but I suppose you could shove half of the weight without compromising the durability. Would that still not be a viable product then? Something a tad heavier than standard big umbrella, much more expensive, but nearly indestructible?

I'd go for it. And yes, I'm very much the kind of user who says they'd go for durable umbrella and, at the same time, also says they use an umbrella very infrequently. Well, that's because umbrellas suck donkey balls, to borrow a phrase from the Expanse. I avoid the light ones as even a little breeze makes them flip their shape from convex to concave and eventually break struts. The heavier ones... well, they all seem to magically break within couple months, so it's always a lottery if I pick one with torn fabric or hanging strut, and then when I do, then what? Throw away the looks-fixable-but-really-too-cheeply-made-to-be-fixed one, and buy another one, fourth one this fall? The whole experience makes me avoid umbrellas except for the heaviest of rains, and it's mostly because of lack of durability.