That's what I think that has been decided by Thecus.
They've recently erased the new version 3 (Ajax interface) beta firmware for N5200(Pro) and will probably only promote their new products with it and will leave the older units on version 2 most likely.
What do you think about this, guys?
If this is true I still admire Thecus for the nice device improvements by their firmware updates. It's not perfect, but it has improved the unit since I've got it