There was a huge leap in auto safety from 2000 to 2010 due to the increased use of high strength steel. I don't doubt that a modern car today is after than a 2007 model, but by how much? 5%? 10%? It's very hard to quantify.

Also a lot of what makes modern cars 'safer' is the inclusion of nannyTech such as stability control, automatic braking, etc. All of this is great, but if you were already a safe driver, there's little additional safety for you personally.