The other part - inherent in Mac's literally for decades - has been the inherent AND FIXED placement of the startup drive icon at the top right of the screen. Normally the internal drive was shown...but on a boot with a different drive or whatever, the ICON of that BOOT item always came up first.
Ah! That issue. What I do is resort those when booting into the different OSs. The clones inherit what was on the original. AFAIK, there's no way to restore the previous behavior. IIRC, Apple chose to do that because the invented the, IMO, useless sidebar and expect users to keep volume icons off the Desktop because they believe most users will adapt full screen viewing, NOT.