> Sure, don't build your system to keep audit trails until after you have questions to answer so that you know what needs to go in those audit trails...what matters is whether someone has specifically asked for that for this particular system yet.

You're going to build an audit trail, no matter what. There's no validated system in LS that does not have an audit trail.

It's just like e-commerce; you're going to have a cart and a checkout page. There's no point in calling that a premature optimization. Every e-commerce website has more or less the same set of flows with simply different configuration/parameters/providers.