alt Hacker News> high megapixel sensors, pre-capture, and cameras capable of pushing between 30fps and 120fps worth of compressed raws or high quality JPEGs
Surely those are buffered in the RAM first, then flushed to the card. When the buffer is full, cameras either stop recording or have to flush continuously, which reduces the burst rate.
Yes, that's correct. Buffer sizes are also all over the place, so if you want to shoot continuously, you need to pick carefully. Check https://www.fredmiranda.com/forum/topic/1856860/0 for a thorough analysis starting with the Sony A9iii (which can fill the buffer incredibly quickly with its premier feature, the 120fps 14-bit raw output global shutter). Deeper in the thread compares to the Nikon Z9.