Sure it is, it’s a research community and not a cult. But at the same time, most people are here because they favour Numenta’s overall direction, so it’s not exactly the best place to find lots of detractors.
A quick forum search returned this as top result, where a temporal memory limitation is called out, it’s admitted as an area of weakness, a frank and open discussion ensues and it ends with a reference to Occam’s razor. Sounds like your ideal thread!