I've generally used MakeMKV to get from protected-source to open-copy, but still as MPEG-2 streams without any loss / transcoding. That's not what you'd use as

I've generally used MakeMKV to get from protected-source to open-copy, but still as MPEG-2 streams without any loss / transcoding. That's not what you'd use as an archivist - you would want something that does structure-level copying instead, so you get menus and chapters and whatnot. Unless you're talking about archiving just the feature, then it's about perfect and lets you preserve everything you care about in a single file.