Tangles, DAGs, and IOTA

https://youtu.be/I_jNH9BlEEo

In IOTA every user is a 'miner' and it's not really a blockchain, but Tangles , DAGs and graph theory in a sense.   Good video.

The real blockchain or a tangle of graph theory?

So blockchain vs dags is coming.  Blocks and tangles.  Graph theory.  DAGs are (directed acylic graphs).  It's used a lot in big data technologies now like spark and tez and impala.  But in the blockchain space you now have IOTA and Hashgraph doing more of tangles and DAG theory vs blockchains,  but both these have detractors as in not much evidence they actually have a working implementation as they claim. 

Time will tell.