I hope I'm not right, I was only joking. But if they do get rid of old replays to recover some database space, I wonder what the criteria is?
Going back to the first page of 'Post your best replays...' there is a nivlac replay from 2009 that still works. Surely ones that are nearly ten years old would be inline for removal first if there was methodology in WGTs cleanups.
(Maybe it's how often viewed or last viewed date that determines their eligibility for removal)