From media centers to Kali Linux: How to dual boot on Raspberry Pi

A Raspberry Pi multiboot lets you pick Raspberry Pi OS, Ubuntu, or MX Linux at startup without changing SD cards.
Liliputing

This software lets you install operating systems on the PinePhone Pro without a microSD card

The PinePhone and PinePhone Pro smartphones are designed to make it easy to choose your own operating system. While the phones ship with a version of Manjaro Linux featuring the KDE Plasma Mobile user ...