The CoRE COF and Curated COF databases include around 600 experimentally reported COFs, and fewer than 100 PPNs have been synthesized. COFs and PPNs are formed by covalent bonds and strong C-C bonds, respectively, which make them harder to synthesize into crystalline materials due to the lack of reversible reactions. Additionally, zeolites, composed of Si and O atoms have only a bit over two hundred known topologies. This lack of available data for other porous materials poses a significant challenge for developing accurate machine-learning models across all porous materials and perhaps is one of the reasons on why the machine learning works on porous materials thus far has been skewed towards MOFs.