Find ways to create a multi-OS USB installer.
Find ways to create a multi-OS USB installer.
In short, you're asking if it's feasible to use GRUB on USB drives for different operating systems like Windows, ChromeOS, Arch Linux, and KDE Plasma. You're considering installing GRUB on a USB drive and booting various installers. That’s a possible approach, but it depends on compatibility and configuration.
Uncertain about GRUB's capabilities, but other programs such as MultiBootUsb provide assistance for your needs.