Going from 3B/7B dense to Nemotron 3 Nano (hybrid Mamba-MoE) for multi-task reasoning — what changes in the fine-tuning playbook? [D]

Following up on something I posted a few days back about fine-tuning for multi-task reasoning. Read a lot since then, and I've moved past the dense 3B vs 7B question — landing on Nemotron 3 Nano (the 30B-A3B hybrid Mamba-Attention-MoE NVIDIA released recently) instead. Architecture maps to the multi