It’s better for developers in different area to come up lists of NIPs that an app should implement.

What I meant is, for example,

Social Apps should do nip 1 2 3

DM should do 2 3 4

Blog should do 3 4 5

Something like this

Then we can visualize the overlapping and reduce the smallest common set of NIPs

Client diversity is also important. Interoperability is useful below a certain threshold.