https://screenrant.com/riverdale-season-7-1950s-setting-how-long/

Riverdale season 7 takes the characters to the 1950s and showrunner Roberto Aguirre-Sacasa reveals how long the final season will spend in the past.

Riverdale’s Journey to the ‘50s Forces Its Main Characters to Regress on Their Development (https://www.cbr.com/riverdale-1950s-main-characters-regression/)

Riverdale's final season journeys to the past, but has erased the characters fans know and love, replacing them with sad caricatures of themselves.