New elements can also be added to the periodic table of elements. Nh, Mc, Ts, and Og were all added in 2016 and discovered within the past 2ish decades

Exactly. It is intentionally open-ended: new "principles" can emerge, split, or retire as the taxonomy evolves. This is just version 1. The grid is a visual index and the fun part is mappin systems to "molecules" in different domains like OS, databases, computer architecture, distributed systems, programming languages, networking, and more..