Reto Treichler is here to give us an introduction into BlockChains and their usage. As there are many good tutorials and talks out there, I for sure won’t go into the details of all the blockchain, chainstate, miner and so on and so forth. For me a strong insight hs been, that with the Blockchain you need to solve the Two Generals Problem.
Really interesting came the follow ups on Turing Complete chains like Etherium and Chains-of-Chains like PolkaDot. It even goes into hybrid approaches where blockchain ensure the pubslishing consistency but maintance of the more related stuff happens in the classic way outside.