I think, wikifreedia would get a huge boost if Wikipedia was imported and as it's inevitable anyway, Looking into how to do it would not be a waste of time neither. On the contrary, it would provide testing data for how accepting relays would be for a ton of data.

If I were to do this, I wouldn't aim to import all of Wikipedia neither. I would go in steps. The 10k most read wikipedia articles first and then 100k etc. but I did actually try to import just one article and it failed due to its size, so there's that. Relays are not ready for really long form content. :(