Just to chime in with my 2 cents (and that's about all it's worth), someone must think the X4 and X6 are desirable vehicles to own. According to the BMW Spartanburg website in May they produced 2,308 and 2,305 respectively. That's not anywhere near the X5 production of 14,682. However, while the X4 and X6 are not the vehicles for me, someone must like them!
And as was said, isn't it great that we have choices!