Since some firmware update released in September 2020 it's possible to boot Raspberry Pi 4s from USB. It's a bit cumbersome to piece the info together, but it's

Since some firmware update released in September 2020 it's possible to boot Raspberry Pi 4s from USB. It's a bit cumbersome to piece the info together, but it's there: https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2711_bootloader_config.md https://www.raspberrypi.org/documentation/hardware/raspberry...