Piracy: ꜱᴀɪʟ ᴛʜᴇ ʜɪɢʜ ꜱᴇᴀꜱ

More if it's something that was available but only from one specific location several years ago and it's no longer available or incredibly difficult to find for purchase. A good example would be certain old console video games that can be emulated now but have long since gone out of print and are either unavailable for purchase as digital or insanely expensive or unavailable for original hard copy.

There's issues with "right to repair" too but that's a different discussion, I think.

With their original comment,

If they make it difficult or impossible to acquire through purchase (false scarcity by removal fro market) or if despite purchasing a physical object, say a car, I can’t fully use it or repair it without special software I think an argument can be made for surfing the high seas.

I'm only talking about the first case of the or here. I specifically pointed out the other case that you are referring to was not something I had an issue with.

Edit: And how does this change anything? Companies aren't any more obligated to sell people things than individuals. There are instances where it may be beneficial for a company to choose not to sell certain products, for example if a better product exists that should succeed the old product or when a certain product is later discovered to be harmful in some way.