We have to restrict the number of tracks in the base package to avoid that it gets too big.
Even if it is clear that there will not be 50 tracks (or in ten years

There are actually in the add-ons interesting tracks (I didn't tested these posted recently, but even there were some nice tracks), that may need polishing/error fixing/making reverse possible ; but that are near to be as good as others.
And here we propose new ideas, it would be strange to have some new great tracks for after don't using them, or an old great.

(I hope that I don't post in the wrong place)