This! Haven’t used that one personally, but seeing how good ruff is I bet it’s darn amazing, next best thing that I used has been PDM and Poetry, because Python’s first party tooling has always been lackluster, no cohesive way to define a project and actually work it until relatively recently
Appimage doesn’t do deduplication where possible like Flatpak does, where did you get the idea that Flatpak packages are bigger?