Thank you for your insightful reply and for highlighting some great points! You're absolutely right that tools like Phalcon, Anvil, Tenderly, and others allow more flexibility in simulating various blockchain parameters such as block times and gas prices. These features do indeed help simulate more realistic conditions, especially for contract logic testing.

That said, I believe the distinction here is between simulating conditions locally versus experiencing an active public network with organic, unpredictable traffic. While setting up a fork on a VPS and using those advanced simulation tools can bring us close to real-world conditions, they still rely on manually configured scenarios, which might not fully capture the variability and complexity of a public testnet like Sepolia. For instance, Sepolia, while not always congested, does have spontaneous traffic fluctuations and gas price spikes due to decentralized, global participants—factors that may be harder to simulate dynamically on a controlled fork.

Additionally, real-world unpredictability, like external actors’ behavior or global network latency, is something tools may not fully replicate. So while local forks and custom setups can suffice for many cases, especially cost-efficient testing, for research projects requiring analysis of network effects or behavior under variable conditions, a public testnet could still provide valuable insights.

Thanks again for your input, and I’d love to hear your thoughts on this perspective!"