Certainly it is "possible", but it is not in my plans at all.
BTW, one of the main problems we have with the GC is how to evaluate it.
We have with us very few real programs that stress the GC. Several times
we asked in the list for more real-case examples, but there has been
very little response. (It is true that many real-case Lua programs need
extensive external libraries or programs and, therefore, are hard to
be used in experiments...)