I doubt it's about the environmental impact. I agree that the environmental impact probably isn't that bad. My biggest concern is that it's $75 USD (plus shipping, presumably), and if the company ever goes under it's now worthless because I can't get a new one.
That said, if I assume that the company will last long enough, I think $75 USD is worth it even if I only get to use it for 4 years. Although if I end up building workflows around the ring, and then I have to get rid of it, that would be very annoying.