I would love an immutable history temporally indexed (shows latest ‘version’ of a row by default), however this doesn’t look like it, and something ‘modern’ being built in Go fills me with about as much trust in its stability and security as it being built in C or C++, which isn’t much, so that’s a weird language choice for something where they keep talking about the security…
That’s even before getting into the lack of pretty necessary features as well.