I'm sure there are cars out there with better passive safety, but regarding technology, MKIVs are hard to beat. Simple, and pretty bulletproof. I prefer cars without an "infotainment" screen. While I don't tend to run into things, I believe the visibility out of the MKIV along with its maneuverability allow me to avoid accidents. I've always driven small cars and my dad taught me to always have an escape route.
I currently have 5 TDIs, three of them MKIVs. Definitely too many. But if I were to part with one it would probably be the MKVII, and that just doesn't make any sense to me, so I don't. The B4 might be next, but it doesn't have much value and it's a really nice drive. And as soon as I get rid of it I know someone will need a good car and I'll regret having sold it. So they sit around on battery tenders while I drive IBW.