Lightweight rims have less meat on them and a much higher chance of cracking / buckling if you hit a decent pot hole or kerb though, great for track wheels IMO
....That's doubtless true and yet my 18" OZ Alleggerita's which only weigh 8kg have been ridden over some potholes etc which I haven't been able to avoid yet they remain undamaged.
Kerbs? No way do I have contact with those!
Me either but accidents happen! I've seem many a smashed alloy oop in the north with all these poor roads, 8 out of 10 have been cheap aftermarket types which is what I really meant, the OZ and TD wheels are built to good standards (OEM) and with top quality MgSi materials so will cope better than other makes.
I've even seen copy BBS LM's with the centres pulled through and warped at a local tyre fitters place!