Fusion 360 accepts SVG files, but they should still be used on a limited basis. When possible, use Fusion 360's native sketch geometry to create the desired shape.
Fusion 360's 2D-sketch will result in a faster and more predictable model. Importing SVG files will automatically re-recreate the SVG lines with Fusion 360 geometry. This often results in hundreds of spline paths. [Read more...] about Using SVG Files with Fusion 360