You’re right. I looked into it some more and you seem to be right that Retro is indeed referring to the style, not the age. Forgive me for the long comment, my intention was only to express my subjective opinion about whether something is retro or retro-styled. I feel very weird calling old games that I thought of as retro “vintage” now, but I guess I have to; I’m going to have a lot of people thinking I’m calling it the wrong thing now. I guess this subreddit should more accurately be called Vintage Gaming, but I have no idea how it would be possible to shift the entire “retro” gaming community’s perspective on what makes a game retro or not.

And by wrong I mean unlike everybody else in the world.

Well, in Victoria, Australia, I think my incorrect understanding is very common, because age being the determining factor of what makes something retro is basically what I’ve been taught from childhood. Everyone I’ve ever met who I’ve had conversations about anything retro with, appear to think very similarly to me.