My first wallet I wrote down the words on a 3x5 card. Played around for a few months, moving sats, removing the app, reinstalling and the like. 

When I went to set up a new computer, I could not find the card.  I could still log into the wallet, so I set up a new one, then moved everything out of the old one I don't have the keys for anymore.

I can see why this scares people, it was only just over 1,000 sats, but still scary.