Your post is quality but lacks one quality. One which I've scanned to see on the list and didn't find it. Maybe, it's there, if not there, I'll add that a quality post is a post with references to the source. And it adds more quality to the first point on your list. References on a particular answer to a question facilitates a better comprehension to the reader by encouraging them to further research about the subject.
I should warn you that not every post with a link will be considered good. What the OP did is based on his own experience; what other links do you need? I will show you an example of those posts that have recently been massively deleted, this was a retelling of articles (check in the archive). But to be safe, the person always gave a link to the source.
A good post or not is always the opinion of the one who evaluates it. Any joke or casual remark can be so subtle and to the point that after receiving merit, it will be considered a quality post by others. A good post always evokes a response - not just soulless communication, but the feeling that the interlocutor is next to you.