horus:
One of the reasons I use spreadsheets for "official" character sheets is that I control where they are stored, and updates/data losses to RPoL don't affect them.
For the record; RPoL has had data loss once in 17 years of operation, and that was when the server we were on suffered a catastrophic disk failure. This was over ten years ago, we got back all our data from a copy made less than a day earlier.
We create nightly backups for disaster recovery. Generally free cloud services have very complex, redundant and geographically diverse systems but don't actually backup your data. There's been numerous instance where client data has vanished and the unfortunate response to that is "sorry" and that's about it. Take from that what you will!