multi lora

Three hundred fine-tunes as three hundred deployments would need three hundred GPUs. Batched adapters put them on one base, and the arithmetic says what each extra adapter costs in memory and in step time.

A replica per variant is 100 copies of a 140 GB base and 800 GPUs mostly idle; multi-LoRA holds the base once and hundreds of adapters in a few gigabytes. The memory arithmetic, the throughput cost of mixed batches, the routing that keeps hot adapters resident, and the two cases where a variant earns its own replica.