If Darkcoin gets too BIG mainstream wise, that might be quite hard to do. Like with what we see with bitcoin. There are alot of real cool features in some altcoins but Bitcoin can't just stop the blockchain and implement as that would cause alot of problems.
True when it comes to Bitcoin, but Darkcoin has The Spork(tm).

haha im learning whats the spork? lol
"Full implementation of spork. Currently this includes 4 different sporks, InstantX, InstantX block enforcement, masternode payments enforcement, and reconverge. This uses the inventory system, so it's super efficient and very powerful for future development. Reconverge will put the blockchain into a mode where it will attempt to reprocess any forks without restarting the client, this means if we even had a fork in the future this can be triggered to fix it without any damage to the network."
https://darkcointalk.org/threads/v0-11-1-instantx-release.3923/page-2#post-41505