Has anyone accomplished the Legendary Legacy achievement?

I don´t think it is really possible (feasible I must say) I am in 6th generation now in one of my families and I had to turn my life span to "normal", though I used to play with the long one but it was boring and repetitive in TS4 (IMO) and loading screens have become almost 1 minute long plus my "out of the house" family members are populating all the town by now so my sims must befriend and marry fake townies all the time and some houses have become ghost inhabbited so 100 generations OMG I don´t think so!