We use small artboards while the devices we design for are huge. For example:
Designing for the smallest size allows scaling assets into the various sizes the different devices require while maintaining pixel-perfect rendering. 1 pt can be translated into 1,4 or 9 pixels at the @1x, @2x, and @3x sizes.
Material Design is continually evolving. The style of the Material text fields changed in 2017 for the following reasons:
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