At least for me, the main bottleneck for TBT and HTM right now is that no one outside of Numenta knows how to implement TBT. It’s a great hypothesis and model. But the only existing implementation lives somewhere in htmresearch. Nor the paper contains enough detail. If I remember correctly it’s thalamus and a branch of NuPIC (changes in C++). I read it and gave up not long later.
Also the fact that Numenta have announced that they are moving away from full neural research mode. Otherwise I would have applied for their HPC engineer position they opened.
I’ve also made my attempts at implementing it. All ended with failure. (Implementing Thousand Brains Theory in a developer usable form (project initiative), A recommended roadmap to implement Thousands Brains Theory?) The best Numenta can do now is to share a clear(er) implementation and mathematical description of TBT with us and we can figure out from there. But I don’t think that’s happening. @Bitking have shared his view on hex cells as a basis for voting mechanisms with me before. But I also never figured out enough to code it.
Let me know if anyone want’s to try. I’ll do my best to help.