To return to the original question: using DeMorgan equivalents outside logic symbols.
'I do this on a “need to” or “nice to have” basis.
The mosr comprehensive example is probably single opamps without a separate power unit.
For those I generate a DeMorgan equivalent with swapped inputs. This leaves the rest of the symbol including power pins intact. Very useful and time saving.
Fpr logic design, I use DeMorgan equivalents all the time (just as suppliers like TI and Nexperia). It results in very clean schematics, ahowing signal function and signal assertion level separately.
If someone wants to pursue this, I can recommend:
William I. Fletcher, “An Engineering Approach to Digital Design”. Reckon with $100, fully worth the money.