Let’s say you start wireframing and need to add a button…
How tall should it be? How wide?
What color?
Dropshadow or no?
Squared corners? Rounded corners? Pill shape?
How much padding should I include on the sides?
Wait, is the text totally centered?
Should I pick a different font?
Maybe I should use medium weight?
This button needs an icon…
Create my own? Hmm, hearts are actually harder than they look.
Look for a library? What was the name of that cool one?
What does the Material icon set do? Noun Project?
Download complete – now bringing it into Sketch.
…
Or, you could just create a button in Whimsical:

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