I don't see how breastfeeding at 8 would stop a child from developing emotionally. Me eldest is 6 and in two years time I really think I will still want him to come to me for comfort and not have to deal with everything on his own. My almost 5 year old still has a blanket and sucks his thumb. But honestly he is the most confident wee man you have ever seen. Perhaps because he has his safe place to go to every night, he feels braver during the day :dunno: Perhaps this child is the same.
Personally I chose to stop breastfeeding at an earlier age. It was my choice, and if I had not stopped I think the twins would still be feeding now at almost 3. As a PP said, in many countries not breastfeeding until 5 or older would be the strange choice. If this child and mother are happy and content then fair play to them. The child will be unable to feed soon enough as their mouth changes (between 7 and 9 they lose the ability to suckle - natures intended weaning age perhaps?), I very much doubt this will be an issue in their teenage years.