You are running the risk of losing your portfolio by not using the latest security updates.
Ledger won't be responsible in any way if you lose coins on an outdated device.
Actually, too much panic is created around some potential security vulnerabilities on Ledger Nano S. For a user to become a victim of an attack/hack of hardware wallet by remote, a certain set of circumstances is required to happen. Incomparably greater chance that the user loses coins stored on hardware wallet is physical attack or so-called
"fingers or a child" where users is forced to give his seed/pin. Much more danger than any attack are the users themselves, no backup or lost seed is a very common way of losing coins these days.
Ledger is not responsible in any way for user coins in device, do you think they will pay me if I get hack on updated device?