Okay, this is not so much a retcon, but an update of a retcon.
When I started into Spider-Man when I was young in 1995, it was in the midst of the jumbling confusion called the "Clone Saga". In which Peter Parker may not be the real Peter Parker, but Ben Reilly was, complete with a new Spider-Costume.
I was therefore, confused in catching up, so I took solace in Untold Tales of Spider-Man. Classic Spider-Man, battling Classic Spider-Villains, in Classic story style.
Not only did I get to know Peter Parker's youth, complete with Aunt May's wheatcakes, got to "grow up" just a little with his kinda-but-not-really friends: Jason Ionello, Sally Avril, and Midtown High football player Tiny McKeever. Watch their hijinks, from walking down the halls of Midtown High with the "In-Crowd", aka Flash Thompson, to their pranks to get Spider-Man's attention in the middle of action. Smiled at Tiny's gradual faith in Peter as a result of him tutoring him in arithmetic, cried at Sally's death, watched Jason's sinking depression from it, leading to even further dangerous pranks for attention, and getting himself back up after.
Now, a couple decades later, my time, and years later, Spider-Man time, a few years back, there was Flash Thompson's Birthday party; guests and cameos and Easter Eggs galore! And among them, Jason Ionello and Tiny McKeever. Good to see them made it into the present alright, but seemingly as losers?
I suppose, not everyone is destinied for greatness, I'd assume which would only be entitled to some of Midtown High's graduation class, but come on, I kinda grew up with those guys!