  This is a commentary on two papers (PNAS 117 (51) 32244-32250 (2020) and
arXiv:2011.06721), which observed a series of ordering transitions in a
strongly correlated two-dimensional electron system confined to a AlAs quantum
well. We summarize the main discoveries (electron nematicity, insulating
ferromagnetism, etc.) of them and speculate on $T-r_s$ phase diagram based on
theoretical considerations.
