The only incompatablity I've seen is that some music racks (especially the smaller 6-8Us on wheels) have enclosed backs and sides so there's very poor cooling.

Bed racks are a popular aftermarket accessory for pickup trucks, but a recently revealed patent filing indicates Rivian is developing its own version for electric pickups. A patent application titled ...

Salamander Designs, Ltd. announced new lines of professional audio rack mounts that are compatible with both its Synergy System and also its flagship Chameleon Collection of high-quality A/V cabinets.