It's amazing that it happened so soon into the life of EOS. A major feature in EOS that many over looked, is its ability to "freeze". Freezing allows it to temporally pauses the chain to be maintained. This is just one of many features EOS has because of its DPOS algorithm. I have said it time and time again, DPOS will set new standards in the industry. That could possible leave POW and POS projects out dated and under powered. There is a great steem article explaining in depth how special this moment really was.
https://steemit.com/eos/@eosphere/what-was-so-special-about-the-eos-mainnet-halt-last-night
I have also posted my favorite interview of Dan talking about the project. I really believe he goes in on some key features and reasoning why EOS is the future of blockchain.
