@coltrane1 Even with very good packing, trusting the shipment of high dollar Jazz Archtop guitars to Fedx or UPS and never having an issue, I would say not only were you lucky but maybe charmed.
Except for the speakers mentioned, which were totally destroyed, I've had relatively good luck both sending and receiving electronics. When I ship I always double box with component in its original box, with foam packing between inner and outer boxes and insist the seller shipping to me does the same. I have, on a few occasions, received fragile marked packages that had holes pocked through or corners crushed on the outer box, while the inner box and component managed to survive.
I will no longer ship or receive any fragile electronic component (no matter how well packed) weighing more than 50 pounds through FedEx or UPS and will never ship speakers with them.
For larger heaver electronics and speakers I'll stick with Global Air or ground freight and have items boxed and crated......Jim