@TheStroyer the command line of run0 is intentionally kept close to sudo's. But that's were the compatibility really ends, i.e. /etc/sudoers and so on we're never going to add compat for.
From my perspective run0 should be fine already for a distro to replace sudo with. But let's see how this plays out, I am pretty sure there might be a feature or two we still need to add before the first distros decide it's ready to switch over.
And I am pretty sure there are plenty of distributions…
@TheStroyer … which think that things like pluggable client-side modules, LDAP and so on are actually a good thing, even though I would vehemently disagree with that.