Comment by incrudible

Words derive their meaning from the context in which they are (not) used, which is not fixed and often changes over time.

Few people actually use the word RESTful anymore, they talk about REST APIs, and what they mean is almost certainly very far from what Roy had in mind decades ago.

People generally do not refer to all smartphones as iPhones, but if they did, that would literally change the meaning of the word. Examples: Zipper, cellophane, escalator… all specific brands that became ordinary words.