Absolutely nothing… This article literally just says that somebody on an internet forum pointed out that what might happen is that if your account has been around longer than the average lifespan then they’ll investigate and maybe terminate it after determining it’s no longer owned by the original account owner. Valve today doesn’t have the support capacity to perform this kind of investigation. Valve in 50-60 years will be an entirely different beast. This speculation means nothing.
I prefer a hybrid approach. A document explaining some common things to do and generally the idea behind why the API is structured that way (shows me you actually thought about it, and makes it more logical to find different parts of it without necessarily looking it up), and then an API spec showing all the parameters.