We have the Kāraṇḍavyūha Sūtra which tells us in depth the benefits of om mani padme hum. As well as a text that tells us the specific benefits of the vajra guru mantra.

But is there a text that talks about specific benefits of OM A RA PA CA NA DHIH, recitation?9

Is it true that Vajrayana practiconers drink alchohol. How does that not violate the 5th precept ? How do Vajrayana buddhists explain why they do this?

So I'm just thinking and I remembered the Lotus sutra and how the Buddha essentially explained, to my understanding how, A fully enlightened buddha doesn't actually stop reincarnating. How the Buddha was actually fully enlightened aeons ago and manifests the therevada path essentially to arise urgency in the practioner and everyone will be Buddhas, and not stop just at arhats.

My question is does the Buddha have memories of his past life his entire life and he's just going extra lengths pretending he doesn't for skillful means? Or does he forget until he meditates regularly again and regains his awareness of them? Is it just personal preference, and a bodhisattva at a high enough level can choose to keep your past life memories at birth and some just choose not to?