I assume that flash translation layers use LSM-like patterns underneath to cope with small random writes. The best case for flash with a good translation layer

I assume that flash translation layers use LSM-like patterns underneath to cope with small random writes. The best case for flash with a good translation layer is data that can be erased/discarded in bulk, since this minimizes write amplification. This is close enough to the "large sequential writes" case but not necessarily equivalent.