This is just my own methodology that I have always followed for my own person hobby sites, but I don't imagine many people do this, nor would they, nor should they.
I log access to a ram disk and truncate the logs daily. If I start having issues that require keeping logs, I rsync to a secure location or rotate until x percentage of ramdisk is full.
My machines boot up and bootstrap their static content, cgi scripts, etc, from a git repo over a VPN link. They dynamically format a data volume using a long random key that I have no knowledge of. The end goal being ephemeral and cattle. If I need to back up anything in a data volume, I do so over a VPN link.
Again, this is just my lunatic method and has never been tested in a legal case. I could argue a thousand reasons to not use my methods and only a few hundred to use them.