You are comparing apples to... potatoes? The whole point of blockchain is that it is immutable and intractable. It doesn't try to be a DB, except maybe in some

You are comparing apples to... potatoes? The whole point of blockchain is that it is immutable and intractable. It doesn't try to be a DB, except maybe in some abstract sense. Whether it will revolutionaze industries or not remains to be seen, but dismissing blockchain as an inefficient DB is simply misguided.