Taro bundles off-chain assets into 1 on-chain Merkle root.
Nostr may enhance Taro by allowing you to distribute full copies of assets to as many nostr nodes as possible without putting the full assets on-chain.
Discussion
How dare you open this two-month-old thread, #[3]
Like you said, Nostr is not a timechain.
Nostr should not be relied on for immutability like a strong Nakamoto consensus blockchain is. Nostr is better suited to paying for off-chain data replication across as many computers as possible, on a gradual timeline with daily/weekly zaps to the nostr nodes hosting the data.⚡️
The synergy comes from them working together, like the other off-chain layers do.