Oddbean new post about login | logout Thanks for this explanation. If one uses foreign liquidity, and they go out of business, the seeds can be backed up and restored on a new node? (to not lose the L2)
You can (and should) backup a channel, yes. You might still "lose the L2" when using such backup due to the channel being force closed, but you'll get your remaining local sats back on L1, so you're not actually losing anything (except maybe Tx-fees for the channel-close).