Anything in the stdlib that operates using automatic memory management `seq`,
`std/[sets, intsets, packedsets, tables, deques,....]`. There is really no
reason to disable automatic memory management in Nim since with Arc you can
just write hooks and it'd be indistinguishable from the C without manual
`alloc` and `free` calls. It's manual memory management you manage the lifetime
of your heap allocated resources and have to insert your free calls where you
want, no different to C, Zig, Odin, or any other manual managed language.
