Quality of Life or Quantity they asked me?

I don't think that's a question you can answer without knowing what is prompting it and while it might be something you need to consider, hardly appropriate in a pre-appointment phone call.  As to what you are able to cope with at 70, I think that will depend on the treatment considered, your general fitness, etc.  I'm sorry - this is not really what you were asking but it seems so bizarre for you to be presented with this in this way.