The chiplets are separate pieces of silicon linked together by a larger chip, whereas SOCs are etched onto one large piece of silicon?

Sounds somewhat similar to what Intel started offering recently, in collaboration with AMD. Basically a Intel CPU and an AMD GPU in a single package, for use in laptops that needed something beefier than an Intel GPU but didn't have the volume allowance for a full GPU card.

They also have a budget Ryzen that does the same thing but with their own Vega graphics. I am using one now for web development and distributed ledger development.

> ... and distributed ledger development.

You are careful not to say "blockchain" :)

Just because something is a distributed ledger does not necessarily mean it is a blockchain.

Yes, they are a dev in the cryptocurrency/blockchain space but still, who knows?

Yea, because the term keeps on being conflated. Blockchain means everything from cryptocurrencies to private ledger systems like hyperledger sawtooth.

I figured those where made much like their APUs of previous years, meaning that it was all on a single die.

You are correct. Look at wikichip for details.

This looks like a step above what Octavo does with the Sitara cores.

https://octavosystems.com/app_notes/osd335x-design-tutorial/