There is a huge difference between decentralized and centralized coins. Decentralized coins have no center of command and thus it is hard to shutdown since there are no centers and can operate as long as there is someone running the system on their pc. Centralized on the other hand is controlled by a center of command, and is being dictated by the people who are at the center.
But sometimes decentralized coins have a disadvantage when it comes to problem troubleshooting since there are no central command who will be in-charge of fixing problems. But overall, I like decentralized coins compared to centralized coins.
Big projects usually have big gits with good devs and big communities, so I wouldn't say troubleshooting is hard in a decentralized environment.