• Rename --xlab to --x-label, X_TITLE to X_LABEL, same for y (#3948) @Suor
• plots: fix error when there are no plots in repo (#3940) @efiop
• dvc: require --external for external outputs (#3929) @efiop
• remote: separate tree functions from main remote classes (#3931) @pmrowla
• remote: modify: fix --unset (#3939) @efiop
• Fix quadratic behavior in Repo._collect_stages() (#3932) @Suor