Originally Posted by Chalice Yao
They don't want TPVs to introduce new in-world content and effects that the rest of the grid can't see. Weird custom attachment points, different region behavior, custom object types.
I can certainly see why they'd be against that, it's perfectly understandable.
The problem is, Linden Lab seems so unwilling to implement these features themselves until their presence in a TPV shows that it can be done, people want it, LL just didn't want to put in the effort themselves.