This could make sense. If we look at Bodhi’s introduction and the “thematic guide to the Anguttara” we see under “X.6 The Domain of Wisdom” only few entries for all categories: DO, khandhas, anatta, 4NT.
As oversimplifying as it is, but maybe nikaya/agama bhanakas were not only specialized on certain texts but on purposes of texts too. And then it would make sense that the doctrinal collections were closed earlier, and that collections with matters concerning life, laity, non-liberation rebirth mechanics (i.e. gods), religious giving, etc. remained open longer, simply because these topics and needs themselves were more in flux in the first centuries post-Buddha.
This could well be, yes. It would fit in the sense that the SN would represent material for dhamma teachers, as I remember Bodhi suggests somewhere in his intro. So ‘khandha’ could have served as a memo for more detailed elaborations, whereas different audiences would have gotten less abstract headlines and more content.
Still, it’s strange to me that the khandhas so rarely appear in verse, be it in SN 1-11 (btw I missed a few, there are 1x in SN 4, 3x in SN 5, 1x in SN 8), or the Snp. It’s not that it doesn’t work - take the Dhp verses for example:
- There is no fire like passion, No offence there is like ill will,
There is no misery like the khandhas, No ease there is higher than peace.
- Howsoever one thoroughly knows The rise and demise of the khandhas,
One attains joy and delight That is ambrosia for those who are discerning.
Or SN 5.9
In the same way the aggregates and elements And these six sense fields
come to be because of a cause, And cease when the cause breaks up.