I've changed upwards of 90% on tanks repeatedly. Never any stress. Usually promoted breeding in both fish and shrimp.
If you've never done it, I wouldn't say not to do it. I've never seen a loss due to large water changes. The only time I've ever seen someone kill fish with large water changes was due to HUGE temp changes(usually too HOT, not too cold, as I only use cold tap water) or due to source water with no dissolved oxygen.