Hmm, I don't know if I can explain, but I'll try.
You originally shot down "Old School" on the basis that it was the "newest" format. I said that the "newness" of the format doesn't matter, it uses old cards that most people think "old school". So you turned around and said yeah, but Vintage also is old school so having 1.5 officially called "Old School" isn't so good because it more describes Vintage. Which I agreed with more; that's a more compelling reason not to call the format "Old School" than the format is "new".
Anyway, if anyone doesn't know, the official name of the format IS Legacy.