I'm certainly not an expert on hardware but this statement from the crowdsupply page piqued my curiosity:

> The SoM plugs into the Reform motherboard’s central 200-pin SO-DIMM connector. This means that anyone will be able to design a replacement SoM to power Reform with a completely different CPU or an FPGA, for example.

So long as you can produce a pin compatible board, the exact details of that board actually don't seem to matter. My first thought when I saw this was "I wonder if you could create a conversion board for CM4 modules" and sure enough the creator of the laptop is working on exactly that:

https://twitter.com/mntmn/status/1462833241933627400

If they can actually pull off a CM4 compatibility board, I'd be super compelled to buy one knowing there's a growing ecosystem of compatible SoMs.