As someone who had a collection of some 300 VHS tapes, back in the day, I can tell you that the rewinder saved wear and tear on the read/record head of my tape player. DVDs are much easier to store, and they are also much easier to collect (I have over 1200, at last count). I promise that I've never purchased a DVD rewinder; Theo wouldn't let me.
If you're enjoying Natural Habitat and would like to see it continue, there's a few ways you can help: