I need an isolated DAC. I could just generate a PWM thing, isolate it, and lowpass filter on the high side. But we could also generate a delta-sigma bit stream, which has advantages. If d-s, I might want to reclock it before lowpass filtering to get clean, fast edges.
But then I could drive several d-flops.
Is this worth doing? It's hard to think about on a Friday night after pasta and beer.