Where's the line between what's classified as a "Compact" (aka point & shoot) and a "Mirrorless"? It seems like it used to be sensor size, where mirrorless simply meant DSLR type sensors and build, without the flippy flip mirror, but with compacts getting larger sensors and better resolution (Like Ricoh GR III's aps-c sensor), where do you draw the line anymore? Interchangable lenses? Form factor? However the marketing wankers want to sell it?