It's worth noting that the controllers for these small displays and their instruction sets have a common lineage that goes back to the 90s --- the SSD1306's loo

It's worth noting that the controllers for these small displays and their instruction sets have a common lineage that goes back to the 90s --- the SSD1306's looks very much like the Epson S1D15300 series, for example. From a quick search, other controllers with a similar instruction set are ST7565 and UC1601.