What's not technical about it? It tells you what the new advancements in the M3/A17 GPUs are, what you should look out for, and how you can take advantage of them. It provides enough information so you can understand what technical tradeoffs you need to make when you target M3 / A17 GPUs. E.g. Register pressure is a real concern in large shaders, and this helps explain how the behavior would be different under a dynamic allocation scheme. It explains how the ray tracing acceleration works, and how it reorders the different intersection calls and how you should avoid intersection queries.

There are some hyperbole interjected about how incredible the performance is but that's only in between the useful data. (I did chuckle at the… enthusiasm of the speaker though)

This isn't a technical document for GPU designers. Apple doesn't really need or want you to understand exactly how the implementation works because that's basically trade secret for them. This is aimed at letting app / game developers know how they should optimize for the new GPUs, since previously Apple just made some ambiguous remarks about some of these new technology ("Dynamic Caching") without explaining what they meant.

But yes, I do like how the Asahi folks tend to end up documenting a lot of how these hardware works, but they also only have public information like this to start from so these are still useful info to have for them.