"From what I hear the major choke point it the lack of truck drivers."
Probably true. But, when traveling on our freeways, the truck lanes are typically wearing out our highways. Also, I have never seen so many new sleeper cabs tractors pulling new trailers or new tractors pulling containers. Railroad equipment is getting a workout as well. Trains are really, really long. Their load can be semi trailers and/or containers, or liquid transporters.
Needless to say, California's infrastructure is getting the worst of this mess. Of course, if the backups continue, it might motivate manufacturers to start up their Made in USA production lines.