I have a client who has an annual complete makeover of their website design and content, but they still want their old sites available to view (each with that year's respective design/CSS).
Once these blogs are "archived", I don't want to have to maintain them any more w.r.t. updating plugins and core files. Previously, when I have left plugins un-updated for too long, I have had some security issues (or at least, that's what my host blamed the last few hack attempts on).
I know there are auto-updating plugins out there, but I don't know about you - I always have to check that nothing is broken with each update (whether auto-updated or manual).
I've considered just generating an html mirror, but are there any other "maintenance free" way I can "archive" my old blogs?