$ETH just opened Platåberget, the public testnet for its upcoming Glamsterdam upgrade — and it’s a bigger deal than another routine testnet launch. Unlike short-lived devnets, this one is built to stay live for months, giving developers, validators, and infrastructure teams real runway to stress-test the changes before they touch mainnet. The headline feature is enshrined proposer-builder separation (ePBS), which folds block building directly into Ethereum’s core protocol rules rather than leaving it to external systems — a structural shift in how blocks get proposed and validated. Alongside that comes block-level access lists (BALs) and a gas repricing that changes how ETH transfers are costed: sending to an existing account still runs on the familiar 21,000 gas, but transfers to new accounts now carry extra “state gas” since they write new data onchain. Wallets, gas estimators, and indexers built on the old fixed-cost assumption will need updates before Glamsterdam reaches mainnet, targeted for late 2026. Worth watching if you build, validate, or just want to understand where Ethereum’s execution layer is headed next. #Ethereum #Glamsterdam