Timax, I read all the posts in the seakayakforum thread. They reinforce the long-suspected division that exists between paddlers who mostly paddle for distance (explorers) and those who enjoy boat handling--surfing, rolling, bracing--(players). Many paddlers do both, but generally the explorers like rudders, which the wise ones use as variable-azimuth skegs when conditions begin to impede efficient forward travel. Serious rudder-users learn to paddle perfectly well without using the rudder for probably 90% of the time.
Players don't generally need rudders, and find them often a hindrance to their full enjoyment of their boats and their abilities. And our kayaking community has plenty of room for both camps, as well as for feathered/non-feathered; Euro/Greenland; soft chine/hard chine; etc., etc.
Sprayskirts and PFDs are another story, however