To be honest, with the way Apple does support for releases 1 or 2 back from current, you could potentially do this easier nowadays: just don't support the curre

To be honest, with the way Apple does support for releases 1 or 2 back from current, you could potentially do this easier nowadays: just don't support the current version (e.g Monterey), only target Catalina or Big Sur. When Monterey is no longer the new one (only receiving security patches), that's when you roll it forward.