A group of Israeli researchers explored the security of the Visual Studio Code marketplace and managed to "infect" over 100 organizations by trojanizing a copy of the popular 'Dracula Official theme to include risky code. Further research into the VSCode Marketplace found thousands of extensions with millions of installs.
You obviously haven’t seen the platformio extension.
It’s a beast, turns VSCode into an embedded IDE and programmer for loads of different microchips