The header screenshot in the article shows a "license not valid" popup and the article doesn't say anything about existing licenses. The quote "one of my colleagues [...] came across the expiration of his license" isn't clear either, but leans more towards "fully revoked" than "no more updates" in my reading.
However, if existing versions do still work, I fully support the dev. In a world where billion-$ corporations advertise 50$/m "unlimited" phone plans that aren't actually unlimited, a solo dev revoking a lifetime support and update plan that cost 7$ two decades ago isn't even worth writing about.
I read it like the change cut off the access to newer versions and older versions still work as before.