If you say something like “apps that are recently updated and using all of the latest APIs should be ranked higher within Apple’s search algorithm and recommendations”, that would make quite a bit of sense to me as an incentive to keep development and progress moving forward with all of the updated tech.
But it makes no sense to force devs to expend the effort to recompile and update an App just for the sake of staying on a store if everything is already working perfectly as intended with no security issues. This is especially a crap deal for small developers without endless resources to continuously be working on rebuilding and retooling projects just for the sake of Apple’s inability to do search and discovery well.