I appreciate that I probably don't understand what is written in those links. But whether you're right or wrong - and you're probably right - phrasing your comment in the clichéd "gentle reminder" makes people refrain from taking your message to heart.
The grandparent comment wasn't mine, and I can kind of agree with yours. I can understand both of you, you in that the phrasing used may feel patronising. On the other hand, it is frustrating to know of a solution, of a good technical and theoretical foundation and see it ignored by the world at large. Hence probably the reminder phrasing used by the grandparent.
