[pjmlp]

And yet Xerox PARC, UK Royal Navy, DEC all managed to write operating systems in GC enabled systems programming languages, some of them quite productive Workstation OSes.

You don't want the GC to mess with your lovely data structure?

Allocate on the stack, as a global static or let the GC know not to touch it.

Check Algol-68RS, Mesa/Cedar, Modula-2+, Modula-3, Oberon, Oberon-2, Active Oberon, Oberon-07.