Not quite sure about this, etaoin. A technology exists but not the technology.

It's too easy to say that the technology exists to get us to Mars when we are still stuggling with sub-orbital space stations. It's not just a case of building a spaceship and launching it. That's been proved to work. It's maintaining a workable life-support system and a healthy crew for ten years in space which are the problems. The technology does not exist for this.