Looking at the upstream changelog the only breaking change is that rdeps that use default-features=false may need to add the std feature.
Very preliminary rdep analsiss (looking only at the version used by upstream git). fontship - upstream still on 0.15 git-delta - upstream still on 0.15 python-maturin - upstream has updated to 0.16 rust-bat - upstream has updated to 0.16 rust-better-panic - upstream still on 0.15 rust-cargo-mutants - upstream still on 0.15 rust-comfy-table - upstream has updated to 0.16 rust-cid-npm - false positive rust-console-error-panic-hook - false positive rust-console-log - false positive rust-dialoguer - upstream has updated to 0.16 rust-expectorate - upstream has updated to 0.16 rust-indicatif - upstream has updated to 0.16 rust-inquest - upstream supports both 0.15 and 0.16 rust-inquire - upstream has updated to 0.16 rust-insta - upstream has updated to 0.16 rust-magic-wormhole-cli - upstream has updated to 0.16 rust-procs - upstream has updated to 0.16 rust-progpick - upstream has updated to 0.16 rust-rav1e - upstream still on 0.15 rust-similar-asserts - upstream has updated to 0.16 rust-stakeholder - upstream still on 0.15 rust-viuer - upstream has updated to 0,16 uv - upstream has updated to 0.16 so 6 still on 0.15 vs 14 on 0.16 and one sitting on the fence. seems like a clear majority have moved upstream. I've gone ahead and updated the new version to experimental, I'll hopefully start going through the rdeps soon.
