Well, what you call here "design issues" I would call "flaws of an imperfect solution". They are design issues similar to how CAP theorem is a "design issue" wi

Well, what you call here "design issues" I would call "flaws of an imperfect solution". They are design issues similar to how CAP theorem is a "design issue" with dbms-s or how concentration of wealth is a "design issue" of capitalism. His system solves a previously unsolved problem, but it has flaws. Do we know a better solution? Well, it's being worked on. However, Bitcoin has been here for ~10 years.