What is the "better / best " method to multi-boot different OSes natively WITHOUT VirtualBox(es) ?

[Ralf Mardorf]

On Tue, 27 Oct 2020 06:29:34 +0000, Steve O'Hara-Smith wrote:
>If the OS is really often used then it would probably make more
>sense, and be far more convenient, to have it available in a VM than to
>multi-boot.

If possible, yes! Proprietary drivers and other issues could be show
stoppers.