Stacks, a layer-2 blockchain project atop Bitcoin, confirmed on Tuesday the activation of its Nakamoto upgrade, designed to make transactions faster. The project's official account on X posted that "Stacks transactions once confirmed are now at least as irreversible as Bitcoin's," and that there is a "significant reduction in transaction times." Stacks, co-founded by Muneeb Ali, a Princeton-educated computer scientist who also serves as CEO of the Bitcoin-focused development firm Trust Machines, is seen as one of the oldest and most credible efforts building layer-2 networks atop the Bitcoin blockchain – no small claim given that more than 80 such projects have sprung up over the past couple years.