It's amazing how attached some Japanese people were to the old aibos.
A report on a guy who specialised on repairing old aibos: https://motherboard.vice.com/en_us/article/8qxk3g/there-is-o...
Shinto priests hold Aibo funeral services from time to time, here's a recent article: http://www.asahi.com/ajw/articles/AJ201706090040.html
Flats are small, not pet-friendly and people are old and lonely, there's a good market for the new one.