The WEH001602A is pin compatible to the HD44780, with OLED output instead of LCD. In 8-bit parallel mode with an FPGA you can exceed the recommended clock rate to drive quite a bit of data into the displays: https://twitter.com/qrs/status/1088240598971310081
Similar higher-than-rated-bandwidth can be achieved on the TRS-80 Model 100, which uses an array of 10 HD44102 controllers. With an FPGA it is possible to draw full motion video on the LCD: https://twitter.com/qrs/status/1092410264316653568