That's a good point... was just looking into how I'd go about backing up my post+comment history and the only answer is basically "you need to use a special tool that pretends to be a lemmy client and fetches your history item by item". I guess "host your own instance and migrate to that" is another one.

Which is surprisingly silly for what was supposed to be a more open platform than others. Heck, I can submit a GDPR request to Reddit and get a full dump of my account within the hour.