

Money and time.
Tons of people build cool projects during their time in university, but the vast vast majority of people don’t because they are eating beans and rice and ramen and pizza and studying, not spending 500€-1000€ on iterative prototyping and the equipment to test everything.
Also with the excalidraw plugin, hand drawing images and such is also possible.
It is not as good for flowcharts and diagrams since there are only like 5 non-specified font sizes, but also usable for notes