There is another option here - the company may refuse to offer a replaceable battery because it would eat into the market itself by increasing the lifetime of the products. And different companies may have agreed, in secret or just tacitly, to perpetuate this. Especially as replaceable batteries are not THAT high on the list of features consumers actually look for - it's not like Samsung could eat Apple's lunch by including a releasable battery in their next flagship. So, better for everyone if they just don't include one.