BlockDAG (Block Directed Acyclic Graph) architectures — as seen in projects like Kaspa, Phantom, or Conflux — claim to solve certain limitations of classic blockchains like Bitcoin or Ethereum. Here’s why some consider BlockDAG-based chains better (in specific contexts):
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🚀 1. Higher Throughput (Transactions Per Second)
Classic blockchains (BTC, ETH) use a single chain of blocks, meaning only one block can be added at a time.
BlockDAG allows multiple blocks to be added simultaneously without orphaning them, massively increasing throughput.
Result: BlockDAG can process thousands of transactions per second, vs. Bitcoin’s ~7 TPS and Ethereum’s ~15–30 TPS (pre-scaling).
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⏱️ 2. Faster Confirmation Times
In Bitcoin or Ethereum, you wait for multiple block confirmations to be confident the transaction is final (e.g., 6 blocks in BTC ~60 minutes).
BlockDAG achieves faster finality because blocks reference multiple predecessors, confirming transactions more quickly.
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⚖️ 3. Better Scalability
Traditional blockchains suffer when many users pile in — block times stay fixed, queues grow, and fees spike.
BlockDAG scales by letting the network process blocks in parallel, so congestion is less of a problem.
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🔒 4. Higher Security in High-Throughput Settings
In Bitcoin/Ethereum, high block rates increase orphan blocks, weakening security.
BlockDAGs tolerate higher block rates without losing security, because even “competing” blocks are still included in the graph.
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🌐 5. Lower Transaction Fees
When throughput is higher and congestion is reduced, transaction fees naturally stay low.
BlockDAG projects generally promise a much cheaper fee structure.
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🔗 6. No Wasted Work (Reduced Orphans)
In BTC/ETH, if two miners find a block at the same time, one becomes an orphan block and wasted.
In BlockDAG, both blocks can be included in the graph, so work is preserved, improving mining efficiency.
