There are two extremes
1. A historicist tendency to sequence texts...e.g...samhita->brahmana->upanishad->itihAsas->purANas
2. A naive traditionalist view that the shruti canon is apaurusheya and anAdi
This approach bases itself on the current recension of the texts, and ignores that many of these "texts" were originally oral traditions which have undergone much accretion
Denies history and historical processes so to speak
And assumes that every text is immeasurably old.
This tendency found among many "neo-trads" is equally problematic