That was my thought too, seems limited like you said. I have no idea why the author wrote this.
Then again for situations where you run out of DMA memory (either 128x128 that won’t fit at all like you warned me, or my current problem I’m looking into where my combined code also runs out of DMA memory for now
Can't get enough DMA memory on ESP32: assertion "matrixUpdateFrames[1] != NULL )
it may be better than nothing