CFOS celebrated it's 80th anniversary on March 1 2020, it will be 86 next year. I can see CFOS massaging their format somewhat but no real big changes at least for some time. Zoomer is the new guy, and CFOS is very well established with the classic hits/talk/sports/full service format. Zoomer does have the advantage that they are already on FM and CFOS won't be for a while longer. But CFOS has a strong morning show and local talk show/news department which Zoomer lacks. I think Zoomer could do well with some of their weekend specialty programming.
Both stations have issues with cancon with so much specialty music programming and the need to load up during regular programming. Don't know if this actually hurts CFOS in terms of ratings but it is something that they need to manage everyday. With CJOS time will tell since they have a similar situation.