On June 8th, the Ethereum Ropsten testnet successfully completed its merge. While the transition date for Ethereum's mainnet shift to Proof-of-Stake (PoS) remains undetermined, this milestone represents a critical final testing phase before mainnet deployment. Following Ropsten, two additional testnets—Goerli and Sepolia—will transition to PoS, paving the way for the mainnet upgrade.
The Final Stage of Ethereum’s Test Merge Preparations
Over recent months, developers rigorously tested clients on Kintsugi, Kiln, and shadow forks—specialized devnets created by forking small subsets of nodes from existing networks. These forks replicate mainnet conditions, enabling precise observation of node behavior during the merge.
With multiple objectives achieved on shadow forks, the focus now shifts to testnet deployment. To prepare for Ropsten’s merge, a new Ropsten Beacon Chain launched on May 30th, providing the consensus layer foundation.
Pre- and Post-Merge Performance
- Consensus Layer Upgrade (Bellatrix): Triggered at slot height 24,000 on June 2nd, this introduced merge-compatible protocol rules.
- Terminal Total Difficulty (TTD): Set at
50,000,000,000,000on June 3rd. Once execution-layer blocks surpass this TTD, Beacon Chain validators exclusively produce subsequent blocks, finalizing the merge.
👉 Discover how Ethereum’s PoS transition reduces energy consumption by 99.5%
Post-Ropsten, Goerli and Sepolia testnets will transition to PoS in the coming weeks. After stabilization, a mainnet TTD value will be set, and client releases will enable the final merge.
Key Impacts of the Merge
1. Energy Efficiency
- PoS eliminates Ethereum’s reliance on energy-intensive mining, cutting energy use by ~99.5%.
2. ETH Supply Dynamics
- Daily issuance drops 90%: From ~14,790 ETH (PoW) to ~1,590 ETH (PoS)—equivalent to three Bitcoin halvings.
- Net buying pressure: PoW’s daily sell pressure (~$19M) shifts to PoS’s net buy pressure (~$8.2M).
Structural Demand vs. Supply:
- PoW: Miners sell ~80% of rewards ($10.5M daily sell pressure).
- PoS: Stakers sell ~10% ($0.3M daily), while burned fees ($8.5M) create permanent demand.
3. Fee Market Evolution
- EIP-1559 burns ~85% of fees, permanently removing ETH from circulation.
- Burned fees = structural demand, as users continually repurchase ETH for transactions.
FAQs
1. When will Ethereum’s mainnet merge happen?
No official date is set. After Ropsten, Goerli and Sepolia must successfully transition.
2. How does PoS reduce ETH issuance?
PoW mining rewards cease; only staking rewards (~1,590 ETH/day) remain.
3. Why does burned ETH create demand?
Burned ETH (from fees) exits supply, forcing users to buy more ETH for future transactions.
4. Will stakers sell all their rewards?
Unlikely—stakers typically hold ETH long-term, selling only ~10% of rewards.
👉 Learn how ETH’s post-merge economics could drive long-term value
Conclusion
The merge represents Ethereum’s most complex upgrade, transforming its economic and environmental footprint. By replacing sell pressure with buy pressure and slashing energy use, PoS positions ETH for sustained growth—even without new buyers. This fundamental shift underscores Ethereum’s maturation into a scalable, sustainable blockchain.
Key Takeaways:
- Testnet merges validate mainnet readiness.
- PoS cuts issuance and energy use dramatically.
- Burned fees + reduced selling = structural bullish pressure.