Port operators hate this. Unwanted containers clog up the portside sorting and storage systems. Eventually the containers are either sent back or auctioned off by CBP, like this stuff.[1]
Some shippers outside the US have stopped shipping to the US until this settles. This includes all the major laptop makers - Lenovo, Acer, Dell, etc.[2] Nobody wants to be caught with a container in transit, a big customs bill due on receipt, and storage charges. That will recover once the rates are stable for a few weeks. Probably.
Customs and Border Protection is trying to keep up. Sometimes you have to pay more because Trump raised tariffs. Sometimes you can get a credit back because Trump dropped tariffs. Those are all exception transactions, with extra paperwork and delays.
Where's the Flexport guy from YC? He should be able to explain all this.
Consumer version: expect to see some empty shelves, rejected orders, and higher prices for the next few weeks.
[1] https://bid.cwsmarketing.com/auctions/catalog/id/167
[2] https://www.techspot.com/news/107504-trump-tariffs-force-maj...