

They make bad small phones that people don’t buy because they’re bad, then conclude its because people don’t buy small phones.
They make phones like the palm palm, the second phone you have to pair to your other phone, for those days when the big phone is too big. Also the battery didn’t even last a day. When it doesn’t sell they say its because it was small, not the everything else.
The doctrine is called force majeure. Most contracts have a force majeure clause.
If an external factor makes a contract impossible as agreed, the contract can be made void under force majeure. This is very common, and suddenly applied tariffs would likely be covered by a force majeure clause because neither party were responsible for them.