With the Sliding Pillar system camber only remains the same if there is no body roll. So as soon as you enter a corner camber becomes directly related to body roll in part due to the fact that with this design geometrically the roll centre is below road level.
Hence the need for negative camber sub frames in race cars to try and keep the loaded wheel as upright as possible and hence more tyre contact.
In the era when it was designed I believe the advantage was that suspension loads were taken out by fixed chassis members rather than moving ones (wishbones) and this a strong design with the roads as they were.Things have moved on somewhat in suspension design of course, but the anachronism rather goes with the car doesn't it?!
Cheers
