My SN850 2TB keeps hitting I/O blocks and freezing the screen during fast scene transitions. Why?

Whenever I'm zooming through the city streets, the game just freezes for a solid second, and it's a total nightmare in asset-heavy areas. I dug into the logs and found the WD SN850 controller was tripping over 4K random reads, with response times jumping wildly between 12 - 28ms, which basically choked the command queue. I tried enabling write caching in system settings first, but while that bumped the write speeds, the read-stutter stayed exactly the same, which was honestly baffling. I ended up using a specialized tool to crank the disk queue depth from 32 up to 128 and manually ran a sector alignment check. In the monitoring panel, I saw the I/O wait time collapse from 45ms down to a steady 8 - 12ms. I actually tried rolling back the drivers at first, but that just slowed my boot time by about 5 seconds until I flashed the latest firmware. The drive stayed cool at 42 - 48℃ with the heatsink. After running benchmarks, the R/W curves finally flattened out, and my frame times locked in at 5.1 - 6.4ms.