I might also mention — I’m old enough to have seen all of these first run in the theaters. Star Wars actually looks relatively good considering it is going on 40 years old, but at the time it was amazing. I don’t even recall commercials about it; it was all word of mouth, “you gotta see this movie”.
Then Empire came along and blew us all away with the origin story — there was no internet to leak anything back then so we had no idea. How often does that even happen anymore? (can that even happen anymore?) So the impact of Empire was way more than any of the other movies, and us old folks still recall it.