To put into perspective just how useless such a metric is, Canon's latest pro camera, the EOS R3, has a meager 24MP. Surely no match for the next Galaxy phone.
It's not so much a useless metric, but there's more to photo quality than megapixel count. I'd love a Canon camera phone but it would be the size of a housebrick. In context, I'll take as many megapixels as can fit into my phone's existing format.
Canon's EOS RP, a mirrorless full frame camera with a removable lens, is smaller than an iPhone 13 Pro Max in every dimension besides thickness. In the past the brick size comment would've been accurate, but I would argue that it more or less isn't so anymore unless you pick up a pro camera.
> In context, I'll take as many megapixels as can fit into my phone's existing format.
As many megapixels? Ceteris paribus (especially keeping the same technology), you'd probably prefer photos from a sensor with larger photosites (maybe 25MP) than this 200MP monster.