I don't see the point, well maybe one, of holding onto GPU rigs even if is for Scrypt-n. Right now I can mine Scrypt altcoins on a multipool with ASICs that auto converts to VTC.
The point of holding onto GPU rigs, as has always been vert's mantra, is to maintain decentralization. You bought your ASICs from where? One of 3 companies that produces the ASICs, who each run their own mining warehouse? These companies effectively hold the keys to any currency which they produce ASIC for (they effectively push all other players out of the game). If they are generous, they will share this key with you.
On the flip side, with GPUs? Anyone can buy them from any of hundreds of locations online or in a store. More people can mine = network is more spread out = has fewer points of failure. The cost to get started mining is extremely low - some people can start with hardware they already have. AMD and NVIDIA do not have warehouses full of mining operations which push little fish out of the mining scene. In all cases, with GPUs, you are not RELYING ON SOMEONE ELSE to give you the key to the currency.
Ah I see, supply decentralization. Whenever I thought of decentralization I wasn't thinking of the tech supply chain.