It is definitely on us to prove that we'll provide long term support for the modules that we're developing, but we're also opening up documentation and reference designs for things like our Expansion Card system. If something ever happens to us, other companies and the community can continue to use and extend the ecosystem.
We designed the Expansion Cards in a way that it's possible to 3D print the housings for them on a home 3D printer and get PCBs fabbed through the normal hobby channels. We hope that folks in the community come up with interesting card ideas and bring them out themselves in addition to what we develop.