This is probably five or six reboots obsolete, but I only just thought of it so give an old codger a break…
It occurred to me that when Superboy was with the classic pre-Crisis LSH they had some pretty dangerous adventures- moments when even Superboy could have been killed. Didn’t the Legionnaires realize that if Superboy got killed, their whole timeline would have been screwed? (And no, I’m not going to count the post-Crisis “pocket universe” version of Superboy, because that retcon came decades later).