its still in the first beta, imagine them as a premature babies (Yes i know it is a weird metaphor)
This is time it seems to be an actual beta, last time it was more seeing how well the idea of "heat" went down with the community... It seems that there a lot of kinks still to be worked out of v42 before a full release, like how glow is heavier than diesel and lighter than solids, but solids float on diesel...