Thoughts on sewer lateral line pipe lining.

I got a camera scope/ inspection today of my sewer lateral. I am not having any problems whatsoever. They determined that most of my line had previously been replaced with pvc. However, there is a small portion of clay that was left that seems to have a very minor crack so they are checking on if I would be a candidate for pipe lining. In addition I have a small portion of cast iron connecting pvc inside the house to the pvc outside the house. It sounds like some camps say don’t bother ever with re-lining, always just replace. What are people’s thoughts? If I go with a replacement I don’t think I see a need to do that now before I have any issues.