>> I guess the distinction between “Kernel” and “System” isn’t quite clear to me.
>
> I guess, for me, Kernel contains those things that are essential to a
> running Smalltalk image. System contains stuff that's generally useful
> to most things - most, but not all.

I've long thought that we'll eventually move Array, OrderedCollection,
Set and Dictionary to Kernel so that Collections could be unloaded...