In fact I have two old notebooks, one of them, run by Ubuntu, was bought in 2010, while the other one (run by Windows 10) - in 2017. Windows 10 machine alternates with Ubuntu one as the node.
I have two copies of blockchain, each of them is on its own SSD. One copy (on 1 TB SSD) is connected to running node while the other one (on 2 TB SSD) is served as backup for the case of unexpected emergency. Having such setup I don't afraid to lose working node. But if it would happen I just could start from the scratch.
I'm curious, if I would lose my node, is it just a matter of setting a new device up and downloading the blockchain again, or would I lose any data, which I wouldn't be able to restore anymore?
Your stash doesn't depends on the state of node and is safe if and as long as your wallet (in your case SEED phrase) is safe.
If your lose your node on any reason (let's say due to the faulty hardware) you may set the new one, connect to this new node your wallet and shazam, enjoy to the full again seeing all your balance and the history of transactions, sure your new node will rescan blockchain first to reveal them for you.
Thank's!