Those who back up, and those who have not lost anything YET. Laptops get stolen, drives fail without warning, and a spilled cup ends a machine in seconds.
Off-site is the part people skip, and it is the part that matters when the laptop and the backup drive are stolen from the same bag.
Delete a file in a synced folder and it deletes everywhere within seconds. Ransomware encrypts the synced copy too. Sync gives you availability; a backup gives you HISTORY. The ability to get back what something was last Tuesday.
Restore one file, today. A backup nobody has ever restored from is a hope, not a plan.
Git plus a remote repository is a backup with complete history. Commit and push, and your work survives the machine, which is the real reason to learn it early.