There are good applications for plastic....helmets and boats are a few...
But, in context...ask how many times have you loaded up your boat with fertilizer, dirt, 1 inch gravel, and the biggie...cobble stones ?
Brings back a funny from decades ago...at the local garden supply...
A guy in front if me was pestering the owner for a better price on cobblestones...he didn't get any discount...
Out back, again behind this jerk
Owner cane out to handle this job himself
Front loader with a side tilt bucket...he raised it to it's max height and then dumped it all...
Thought the poop head guy was going to bust a neck vein yelling at him...
At my turn...smiled and said wished it could have gone higher...owner said...me too...
Pickups will see lots of abuse and plastic beds will not hold up...IMHO...