I had also considers these features, the decentralized acrylic graph, and more features that makes IOTA special is the ability to deal with security and scalability
issue that has been the problem with many projects, and seeing as there are no blocks, there is no mining as well. This poses a lot of benefits: feeless transactions, no centralization of control by part of the miners and no discrimination of participants in the network, and no high resources and hardware being used.