Majority of huge hacks and security flaws lately have been because of exploitation of cross bridge hacks.
In DOT bridges are central part of the design, so how in the world i can trust tech that experimental to be secure?

Also DOT hasn't even created anything interesting or significant. It's most likely not going to revolutionize anything. I am not saying that others would do that, but at least some of them have more ambitious design and who are focusing on actual existing problems. Not building on top of the problems.