I get some peace of mind (in both professional and business settings) from having backup include a physically separable and 100% offline component. I like knowing an attacker would need to resort to kinetic means to completely destroy all copies of the data.

The physically separable component often lags behind the rest of the copies. It may only be independently verified on an air-gapped machine periodically. It's not the best copy, for sure.

I still take comfort in knowing attackers generally won't launch a kinetic attack.