A uniformly discrete counterexample to bounded approximation in Lipschitz-free spaces
What the paper claims, in its own words
Constructs a countable uniformly discrete metric space whose real Lipschitz-free Banach space has the approximation property but not the bounded approximation property, answering Kalton's question negatively. Finite-rank operators approximate the identity on every compact set, but their norms cannot share a finite bound.
The plain-language explainer for this entry is still coming.