I always disagree with backing up anything in the cloud since it shows that you have sensitive items and it’s a matter of privacy. It’s also a matter of security even if the key is encrypted, because it’s easy to mess things up. So I would always go against this option of an online backup of a hot wallet, even when used in a multisig setup.
Just like I have posted before, I also do not like it. But not only that, I also do not like any third-party services when it is about bitcoin. The best solution for me is multisig setup which is enough for inheritance purpose. Also another is time lock. There are other means you can easily make your hires inherit your coins than relying on those services.