We have vastly more high school Peter stories in 616 since the 90s with Busiek’s work and Slott’s Learning to Crawl then in the actual 60s or any time before. Peter graduating high school didn’t kill high school Peter.

I mean the high school Peter is a 90s product and not inherent to the foundation of the character at all. Peter was never created and intended to be in high school by either Ditko or Lee.