I recently looked at 1" sensor compact cameras, including several generations back, since they are still sold today. Main improvements in the sensor was backsid

I recently looked at 1" sensor compact cameras, including several generations back, since they are still sold today. Main improvements in the sensor was backside illumination (same as in phone sensors, maybe phones were earlier) and sensors with DRAM attached as a cache for those 4K @100500 FPS insane videos. And technically, just attaching DRAM doesn't mean that sensor itself has changed. You can see in the same model lineup how manufacturer puts same exact sensor for several generations in row, improving other stuff. I guess in general sensors are at a limit, unless some breakthrough will happen. Phones improved extremely fast recently but still small optics are dark and AF is usually not great.