What will happen with your old Ledger Nano S wallet if you lose it and you back it up using your 24-words to a new Ledger Nano S wallet?
Nothing will change on your old Nano S
I mean, will people still be able to manage my funds if they got the pin or is it wiped clean? Cause if not wiped clean, this does not give me a secure feeling while the older wallet is still out there with a possibility that someone guesses the pincode.
If someone has your old Nano S and the pin code they have access to your funds but 3 wrong successive PIN code attempts would reset your old Nano S, then they would need your 24 word seed.
And if the old Nano S is not wiped, what would be the most secure way to set up a new wallet adress? (Maybe setting up a new web wallet, sending it there, resetting the Ledger Nano S, then use it as a new device, and finally sending the coins to the new address?
What if I lose my Ledger Wallet?
If you have any doubt about compromise of your PIN code and/or second factor card, you should immediately transfer your balance to another wallet.
https://ledger.zendesk.com/hc/en-us/articles/115005161445-What-if-I-lose-my-Ledger-Wallet-