To answer your question - if that is OK given the level of passion on this issue - and if you are still following this thread that you started - as an avid follower of the gear and myog forums, I've really seen few if any more recent reports of failure, and lots of reports of Cuben weathering lousy conditions. Matt Edwards' reports impressed me the most, given the length of his treks. Eb Eberhart doesn't post on this site; but he has been using his own Cuben version of the Nomad design for years of long distance trekking since before the cottage manufacturers began making them. However, on May 13th, Brendan Swihart reported on myog that his 1.5 oz. cuben pack quickly developed a couple holes from light abrasion. (That caught my eye, because I am planning to use the 1.26 oz Cuben for a tent floor. The alternative is the Thru-Hiker silnylon, which is kind of on the slippery side for a floor, compared to other less water resistant silnylons.) But no reports of failures of Cuben tarp or tent canopies. The last one I can remember involved a goat (mountain goat?) landing its hoof on a Cuben canopy wall with a BANG!, and even something like that could be patched more easily than silnylon to last until better repairs could be made. So the evidence suggests that you would be fine with something from one of the companies that has gained experience using the material and a good reputation evidenced by the company reviews on this and other sites.
The whole business of the stitch holes is very worth noting; however, a number of the small companies, like Lightheart Gear, are taping sewn Cuben seams over the stitches to address this. Seam construction and bonding are big issues for myogers, as they should be; but if you are going to buy something already manufactured, you might have little interest in getting into all the minutiae that involves.
Hope this is at least somewhat responsive to your OP, which seemed reasonable enough. Agree with family guy's comments 100%.