How Much Can Modern Upscaling Rescue a 5MP Raw File?

The megapixel debate never dies, but this one cuts through it with actual prints from a 2002 camera. The practical payoff isn't nostalgia. It's understanding the real floor for large-format output, which matters when a client hands you old files and asks for a 1-metre print, or when you're deciding whether your 12MP backup body can cover a wall display in a pinch. Modern upscaling has quietly changed the answer to 'how many megapixels do I actually need' and this test puts a number on it.