I got about 38k miles out of my rear tires before I had to change them. which isnt too bad, but camber wear was noticeable. the rest of the tire was in decent shape except for the insides. last time I had my alignment done they were able to get:

Rear Left camber within spec: -1.9 (range -2.2 / -1.5)
Rear Left toe within spec: 0.16 (range 0.07-0.23)
Rear Right camber was out of spec: -2.6 (range -2.2 / -1.5)
Rear Right toe was in spec: 0.17 (range 0.07-0.23)

im not sure what rear cross camber means but that was out of spec at 0.7 (range -0.5 / 0.5)

everything else was within normal limits. Im almost at 120k miles and I haven't touched any suspension parts (minus front air bags). Maybe that's all i need is some fresh bushings to get my alignment in spec. alignment guy said there is no adjustment in the rear so it got me thinking about these adjustable arms.

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2000 E53 4.4
2011 E70 35d