Pricepoint can have a huge impact on choices as well. There is also a rider weight limit on some lightweight wheels as you probably know. Other determining factors are what the wheel will be used for-everyday riding, mountains, time trials, etc.

The splits are certainly not really unusual for older wheels but also are uncommon for that rim.

A 32 spoke wheel with a Mavic Open Pro rims are usually really solid wheels so hard to argue with a choice like that. For me, those would be good everyday wheels and I'd opt for a lighter wheel for riding that I do that has a lot of climbing.