@Boylehp Thanks for reaching out!
While we have carried some shoes in the past with metal studs in them, they were all designed for running and walking on ice and hard-pack snow in winter. You can see an example here. Personally, I've never seen a shoe with studs designed for rock and mud before so thank you for your post.
These shoes from Inov8 are designed for adventure racers/orienteering events, which is a pretty small niche of trail user. It does not appear that REI is planning on carrying this model. We appreciate you bringing your concerns to our attention, we will be sure to pass them along to our footwear team.
Thanks again, and have a great day!