Ok but if it gets so good it replaces all the employees, how do people have enough money to pay for their services?

Depends on your paranoia/fault tolerance level. In general some form of the 3-2-1 backup rule. Personally I use arqbackup:

1. Local live copy
2. Hourly differential backups to another network share
3. Hourly differential backups to an s3 compatible bucket with object lock and versioning so malware can’t wipe the latest 3 months or so.

Edit: I also forgot, 2 and 3 don’t exist unless you’ve verified that you can restore from them recently.