Yes but you don’t need two launchers for that, only the latest one. Countries financing its development will want to use as much as possible to bring the cost p

Yes but you don’t need two launchers for that, only the latest one. Countries financing its development will want to use as much as possible to bring the cost per launch down. As implied by the comment I’m replying to, the only reason to keep Ariane 5 flying would have been its good track record bringing business on the commercial market but that’s not going to happen because Falcon 9 gets all these customers now.