If question is on retaining a list of SOLD items for 75 or 90 days or more, I am for leaving it as is or increasing it to 90 days or 4 months or more. Very handy to check on sales.
If someone sells seasonal things, I don't think they would retain them on the sold list anyway would they? So maybe people are talking about the UNSOLD list.
I am for increasing the length that the unsolds are kept. Since I use 7 day auctions, x 10 auto relists, I have only a small window of opportunity of retrieving it from the unsolds and relisting it if I forget/skip one.