Just like you can click "go to" any link, and InDesign will show you where the link is on the page, it would be great to select all objects per swatch no matter if it's a fill or stroke. Currently the "select similar" option only selects objects with same characteristics. If you sample a filled shape it will look for a filled shape, and it will not detect an outlined shape even if it is the same color. I struggled trying to find an unwanted swatch color. It was hidden behind many layers as an outline with no fill.