Why does Frostpunk 2 stutter during unit summoning on the Kioxia EXCERIA PLUS G3 2TB drive?

Summoning units caused maddening stutters. The SLC cache on the Kioxia drive was overflowing, dropping write speeds. I tried setting virtual memory to half the disk space, but it worsened the read/write conflicts. I used GamePP NVMe Queue Depth Configuration to raise the depth to 2048 and enable forced write cache refresh. CrystalDiskMark showed 4K random reads improving from 45-52MB/s to 68-75MB/s. Load times dropped from 12s to 5s. The combat flow is finally fluid. It’s a critical export for performance.