Cool bike.
I've known a person or two who run tensioners even with sliding drops or concentric BBs. Other than the slipping axle reason there's also that you can get absolute min or max wheelbase or gain some additional room to adjust ratios without breaking the chain.
I've personally had mixed luck with skewers and slipping. Salsa Flip-offs are my go-to to prevent it.
Welcome. Cool bike! I live in Bozeman and will maybe run into you sometime. Love to see that in person