Even if its one person, you would have to start somewhere. Maybe they have your data from the last 24 years, as per your example. If you cut off now, five years later, they still have only 24 years of your data. They won’t have the last five year’s data, which would be crucial for them.

That’ll be difficult, because a number of lemmy users have been redditors before. On the other hand, number of lemmy users that could have migrated to reddit is nil, which is probably why redditors are not talking about lemmy or the fediverse as much.