The RC spirit may be real in some estates, but NC spirit, almost no such thing.
NCs are mostly relevant for private estates and the lack of engagement is more likely to be the case due to the residents' profiles and nationality.
But admittedly, for the recently concluded enbloc sales, it might have more relevance due to the origins of the HUDCs. Some of these neighbors had been living together for many years and are generally of local profiles. But even then, they had to decide whether to trade this kampung bond with old developments (and high maintenance costs) with newer developments and more appropriately sized units with a new kampung spirit to be built.
The three laws of Kelonguni:
Where there is kelong, there is guni.
No kelong no guni.
More kelong = more guni.