I agree that the older materials have a longevity that I haven’t experienced with the 525 ballistic - as much as I dislike the fur-magnetic part of Cordura, I’ve washed my Imago probably a dozen times and used it very hard and it doesn’t show any wear except on the plastic buckles. 1050 ballistic is only destructible by Rosalind the very determined Puggle pictured below, if there’s food in a closed bag.
For Halcyon (well, actually it was Dyneema at the time of purchase) for exterior fabrics, I’ve accepted the lightweight bag in exchange for less resistance to wear-and-tear. It’s a fair trade off for me because the bags are very packable and light. I don’t get it for the same use as a bag for which I would select 1050.
However, as much as I love the feel of the 525 and colors of it, it hasn’t had even the wear of the 200 Halcyon in my experience. Hard objects on the inside of bags form marks on the outside (water bottles, Kindle in the Side Effect or Side Kick, laptop without a soft case, etc) after just a few uses, with any color, and abrasive surfaces scuff up and make fuzzy the outsides of bags (concrete, unfinished wood, brick - which didn’t affect even Cordura at all).
I would hesitate to purchase a bag with a exterior fabric even less structured than the 525. I completely understand the production and logistics behind limiting fabric offerings of a bag to one type, but I really wish I could get 1050 options for just a few more bags. I love the idea of experimenting with new fabrics but not at the expense of the older, mainstay, durable ones.