There's plenty of things that Emacs does right, but evil-mode is far from ideal. Many plugins don't support it OOB and need special workarounds. Many others expect native Emacs keybindings and you need to manually add ones for evil-mode specifically. Nowadays I don't experience many issues with it, but this is mostly because my setup is largely static, and it took me several years of tweaking the configuration to get it in a state that's usable and intuitive for me. It's unreasonable to expect everyone else to have the same patience, so an editor with a _native_ modal UI can certainly improve the user experience.