Some aspects of the conversion can, and should, be scripted. Some should be manual.
There is no reason to go through each post. Prioritize them: if someone comments on an old post, clearly it’s active, so edit that. If a post is getting a lot of traffic, edit that. Otherwise, leave it alone until there’s a reason to edit it, or you have time to do so.
(Also: crowdsource this stuff. Let trusted volunteers submit edited HTML, then drop it in as a replacement if it’s good.)
Are you imagining a manual process where you look at each post and edit it? I was assuming Oliver had in mind an automated script.
Would you expect it to be easy to script the conversion?
Some aspects of the conversion can, and should, be scripted. Some should be manual.
There is no reason to go through each post. Prioritize them: if someone comments on an old post, clearly it’s active, so edit that. If a post is getting a lot of traffic, edit that. Otherwise, leave it alone until there’s a reason to edit it, or you have time to do so.
(Also: crowdsource this stuff. Let trusted volunteers submit edited HTML, then drop it in as a replacement if it’s good.)