Just today I tried to understand the backup principle behind Veeam with my senior.
After that I (soft) bricked my head trying to visualize the GFS principle.
Lol that was fun.

But then I remembered someone imagined the whole backup cycle and not only invent it but the dev team needed have so much knowledge to not only adapt it into software but that it's considered beyond business critical software.
In Germany we have the saying "Kein Backup, kein Mitleid" (No backup, no pity) and we literally just hope the software does as it's told to do.
Even if we test backups it's crazy how we rely on it.