For example, I agree that elasticity is great. But at the same time, to me, it sounds like bad engineering. Why do you need to store terabytes of data and then delete it - couldn't it be processed continuously, streamed, compressed, process changes only, and so on. A lot of engineering today is incredibly wasteful. Maybe your data source doesn't care, and just provides you with terabyte csv files, and you have no choice, but for engineers that care about efficiency, it reeks.
It might make a lot of sense in a highly corporate context where everything is hard, nobody cares, and the cost of inefficiency is just passed on to the customer (i.e. often government and tax payers). But the real problem here is that customers aren't demanding more efficiency.