Because the article talks about all these technologies on a basis that appeals to engineering sensibilities -- ease of development, tolerance to failure, latest

Because the article talks about all these technologies on a basis that appeals to engineering sensibilities -- ease of development, tolerance to failure, latest hotness, etc. Many fewer words are spent explaining these technical decisions from a perspective that considers the bank's strategic interests. Without much relating it specifically to the needs of a bank, there's not much to separate it from any other company's explanation of their tech stack.