Could you talk about what is taking the project so long out of curiosity? (I work in manf/eng) Are you having funding issues or was something not working properly? 5 years seems like a bit of a stretch for this scope of project
I mentioned earlier that we developed a new material process for PBT that took a long time to iron out.
I go to China approx. every 3 months, so progress happens when I'm there, and slows when I return. This approach works well for developing hardware, but not so well for developing new materials (hence the long delay).
We also have some new tech that is being integrated into this project, but has not been announced yet, so I can't elaborate further. That new tech has been in development for almost 2 years, and is nearly done.
Finally, we've designed some new metal components that make it easier to build custom layouts. This 60% keyboard will be the first one to use those metal parts, and will be a reference design for other projects that wish to use them.
I know all of the above sounds vague, but I think you'll find the wait was worth it, once you see what we've made.
Internally, we've been saying that it's like you bought a Volkswagen but then find that we shipped you a Tesla.
I hope that helps.