new Stream Test::Simple question, XS requirement

[bulk88]

Since Test::Stream::Context's core design uses weaken() everywhere, that 
means new Test::Simple always requires XS building (for Scalar::Util), 
which means it will never run on miniperl, and hence, new Test::Simple 
will never be in Perl core, is my understanding correct?

I am asking this since if new Test::Simple is not PP clean and never 
will be, there are couple places I would like to throw XS at (the 
accessors in Test::Stream::HashBase::Meta in particular).