the best thing to do is to migrate by deleting your content from Reddit and moving it elsewhere

That’s not really realistic for the type of content that is Reddit. It’s not like blogs or videos or photos that the majority of people have on Reddit. Most people’s “content” on Reddit are bookmarks/links or comments in a discussion threads.

It doesn’t make sense to just re-share a dump of all the links you once shared on Reddit even if you have a list of them.

It also doesn’t make sense to re-share comments out of their discussion context else where.