I also agree with you, that this feature has medium importance. I think our install of apache is not very common. We are running mod_php and as a consequence relying on the prefork modell, because php is not thread safe. Also please notice that the presented config was changed to maximize reproducibility. On our production system we have about 700 processes running the most of the time, but on peak traffic this number rises to 1000-1200 producing the hanging that i have described.
So while systems with such load may be uncommon, the reported problem is still existing in the real world. Thanks for paying attention to it!