not really a mystery… or shock, its not that common for tear down pictures, esp for more ‘niche’ products
organelle-1 and organelle-m are very different.
the organelle-1 uses a SOM by solid run, see hacking section for more details
the organelle-m used a CM3
so neither are a rPI + hat, that would be much bigger in physically, rather they both use SoC boards.
in both scenarios you could theoretically upgrade the SoC with a compatible SoC, however, this may require firmware/kernel changes!
if you see my thread on the quad-core organelle, you’ll see i did this with the organelle-1.
the organelle-m actually has a reasonable amount of RAM, and could used for a browser - its basically the same hardware specs as a rPI3b. and is running raspbian so is compatible with rPI software.
note: whilst you could use the organelle-m for general purpose computing, if you are not careful with the software you install you could easily degrade its performance for musical/audio use.
e.g. modern operating systems incl Raspbian, have a ton of software running in the background that make them ‘easy to use’, but can interrupt audio processing tasks or make less cpu/memory available for audio work.
so personally, given the price of a rPI, I prefer to keep a dedicated rPI for non-music stuff, and focus the organelle on audio work