Promises, promises.
Right now they’re ~$400 billion in the hole.
And they have to update the chipsets periodically so that their competitors don’t suddenly have much better performance than them.
And the electricity and water costs will not magically disappear.
And another thing that is never mentioned - the lawyers. One can be assured there will be more lawsuits than we can count by people (honestly or dishonestly) by anything that is built with substantial AI in it. The product or service using an AI program is going to be targeted whether it works or causes harm until the dust settles and it is going to take many years.