Decomposed body found in affluent Dublin suburb

That's an affluent Dublin suburb? That's just a typical row house, not even semi-detached.

This is so sad. We should try to keep an eye on our neighbors especially when they live alone.

That is very sad, but I suppose if people miss the boat for married life and children, or are estranged from their family by divorce, etc. then this sort of outcome is likely. Many people live alone these days and the fact the houses bought and sold, or rented out on a frequent basis means people bother with their neighbours less. Because of this transience, people are often reluctant to get to know their neighbours in case they turn out to be "nightmare neighbours". Also, everyone in the household is often out at work all day which leaves no time for gossiping over the fence.