So far as the VF V6 engines go I'm guessing the problem you're referring to is the cam chain issue. It's my understanding this problem was sorted on the later engines. Either way the V8 has its issues too.
Decide on the vehicle that suits your needs. Nearly every make/model can have issues.
I don't know for sure but when I was asking about a couple of VF V6 Utes, the owners mentioned having the cam chains already replaced when I asked if it was a V6 or V8. I assumed they were V6 because of the price but some people try not to mention it, unless asked.
Yes agree most cars have some sort of issues, LS most common issue is the lifters AFAIK. It's about a $1500 - $1600 job to get them replaced before they start to fail, a lot more if they do fail. But reading about the transmission issues ZB has I know what I prefer to have go wrong.