In 5 or more years you will have 1TB ssd on... mobile phones running nodes...
See you then. Meanwhile, Darkcoin will become the go to privacy-centric in several months. There are already solid ideas on how to make unmasking transactions through node collusion exceedingly difficult. Impractical even for an entity that controls half the nodes. So once that is done, what exactly does CN have to offer?
How would it become exceedingly difficult? AFAIK right now it can be done by any masternode.
Even if it's impossible, the Darksend privacy is still fundamentally flawed, see
http://www.scribd.com/doc/227369807/Bitcoin-Coinjoin-Not-Anonymous-v01 and
http://www.coinjoinsudoku.com/advisory/.
Monero has
impractical working anonymity
now.
Fixed that for you. Until I don't read about "wait for your transaction to be included guys, everything is fine!". Until it doesn't take an exorbitant amount of space to run a node. Darksend has had some big changes recently. There is never a point where a single masternode knows both the sender and recipient. By using multiple nodes, the practicality of node collusion can be eliminated.