Black Cat > MJ. Self serving but deep down good Black Cat is a much more interesting character compared to the girl next door MJ. Besides both being people with 2 lives Black Cat and Spidey understand each other in a way that I don't think MJ can. I don't like seeing Spidey saving the day while MJ worrying about him back at home.
You can go two routes-
Archie-where nobody ages
Dr Who-do the final stories for Peter and company. Let Miles and others age. However you can still do books featuring the younger Peter. We have seen Dr Who 1-12 come and go yet they are still doing new stories with them in comics.
Same with Star Trek.
Just leave certain events vague like who is President of the United States unless you have to like something like Puerto Rico becoming the 51st state.
There's always a new generation coming into the market. Should they be denied a Bat-Bruce or a Spider-Peter because we old fogies remember him being a twenty-something forty years ago?
I'm okay with letting the timeline be flexible, and Peter's 'twenty-or thirty-somethings' lasting my entire life. I don't need him to age in a 'realistic' manner when he doesn't do anything else in a 'realistic' manner.
This way, the next generation can have him to.
Why in the name of the Living Tribunal do Morbius and Mobius have absolutely no connection?