Arch Linux (BTW) is my main/dev OS, but also Windows 10 VM for certain projects.

For simple scripting in any language: VSCodium

PyCharm, Android Studio for projects in specific languages.

For other full projects: VSCodium

As for testing/deploying projects, I have a QEMU dev VM that's connected to my IDEs using shared folders running basic Arch with fresh install of KDE Plasma.

Plugins mainly consist of QoL features, linting for certain languages in VSCodium, themes, etc.