What exactly is your point? That technology changes, but despite that, we need to live by the same means that existed 240 years ago?

Look, I get the PR motives behind trying to limit the definition of assault rifles to strictly those capable of automatic fire. The problem is, an AR15, or any semi-automatic that is magazine fed, is still an effective tool for killing lots of people in a hurry, making it an assault weapon in the public eye.