Delusion

Even if you already bought the same product before and want to buy another before it goes EOL, vendors often replace parts during the lifetime of a product, and the easy-to-replace firmware that controls it may change from one batch to another, and you may end up with a product with different quirks.

So, no, you don't buy it knowingly because you can't possibly know ahead of time. What you know is what the vendor purports it to do, but you know marketers... If more politicians did 1^{-9} of the good their marketers purport them to do, the world would be a much better place.

Now, of course the only thing between you with the quirks and the dream the vendor sold you is the lack of freedom for *someone* to come up with the solution. It doesn't have to be you, although you can and should help if it matters to you.