Have you looked at https://byteball.org what is your opinion on that?
Yes, would be interesting to get an opinion because...
...I'm still not convinced that Byteball is a pure DAG coin, to prove my position I would need to generate a lot of transactions on Byteball network to show that in certain conditions (related to DAG topology) TPS growth is negatively impacted by necessity to pick the main chain. If you compared Ethereum (which calls itself blockchain) and Byteball you would see that they don't differ much:
The best image of Byteball is this, an actual DAG.
Byteball is the first DAG-coin, the first! The first IoT coin, and the first on exchanges and actual use in livenet.