I keep coming up with ways this could be done. I don’t think purist insistence on complete abandonment of Reddit are useful, since Reddit alternatives always seem to suffer from a lack of content. I’m something of a programmer myself, and these are some moves I’ve considered making:

• A map of equivalent subreddits <-> communities to ease migration for those of us with hundreds of subreddit subscriptions.
• A RES-like script to post reddit content to Lemmy with a click, such as to the equivalent community for example