General: Why not make Sequence a type of Component? Why not enhance the notion of Partition/Sequence to cope with the need for Streams?

My understanding is that Streams are just a particular kind of Sequence (Partition), a new animal with particular rules of inheritance to minimize the amount of repeated data (by inventing the Stream Payload Base). Why not doing that with animals we already domesticated: A Gluon Payload Base or Sequence Payload Base?

I do not feel comfortable with such overlapping concepts and specifications.