Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
Parallel build is now (since latest version 2.4.0) enabled by default but only on new projects.
SW4STM32 won't change the old projects to not disturb clients.