Without wishing to discount the obvious failures apparent here, how many people own i-beam saddles/posts that have not failed? I do, and I’ve bent two saddles and a post before I got an i-beam and it’s been fine for well over a year.
Saying there are 8 failures in a single thread on a forum does not mean that a product is inherently faulty, what you really need to see is the percentage failure rate in context. If there were only 16 posts sold in total, this would be a 50% fail, but if there were 16,000 then this drops down to 0.05%.
Most people will only ever complain about products and not praise them when asked so any complaints on an internet forum will not necessarily be a true reflection of a product’s quality.
I will of course retract the above when I tear myself a new a-hole if mine breaks ;-)