Consensus is that Apple Intelligence requires the 8GB of RAM included in its support SoCs.
Standing outside the ”AI” umbrella we have a handful machine learning features, including web page highlights and summaries, mail categorization, voice transcription in notes, and the fix-my-handwriting Smart Script feature on iPad, one I’m personally very interested in.
Alas I was disappointed to learn this feature will not be supported on my 4th-gen (A12Z-based) iPad Pro. Curiously, though, the feature is supported on several non-Pro A14-based iPads.
Why might this be? The A14 is a 4GB SoC, while all A12Zs include 6GB of RAM. It so happens that the A14 introduced the 16-core neural engine; all ANEs before it featured only eight cores. <sigh>
Anyway, just pointing this out as the first ML feature where evidence points to the ANE itself, not RAM, as the constraining factor.