I have found that automotive ball joints and other components made by Lemförder are superior to most other makes generally available, and are OEM equipment on many VAG vehicles.
This is due to the design of the cap covering the top of the ball joint, where the ball assembly is inserted during manufacture.
Cheap designs use a thin stamped cap, which has a larger space between the ball and the cap, compared with the thicker machined caps.
The gap is filled with a cheap injected plastic webbing to make the socket structure between the cap and the ball, rather than a thin solid layer of a hard plastic similar to that used in bushings.
This plastic webbing gradually compresses under load, causing excessive play in the joint, which leads to premature failure or diagnosis of "excessive wear".
On some great and glorious day the plain folks of the land will reach their heart's desire at last, and the White House will be adorned by a downright moron.
H. L. Mencken 1880 - 1956
Some may not like his views, but what a prediction!