Three electricity worlds make the comparison legible. Mature systems are seeing demand return to networks built during a slower era. Fast-growth industrial systems must add enormous volumes of demand, generation and networks together. Access-constrained systems still need first connection, dependable service and affordability, often with limited fiscal space and a high cost of capital. This is not a ranking. Each world is tested on the same six questions: what drives demand, what generation is being added, what network work is required, what flexibility exists, whether reliability or access improves, and who ultimately pays.S01S08S11S22
In the United States, national demand growth has returned and data-centre concentration makes local capacity, generation adequacy and cost shifting visible. FERC's 2026 show-cause action covers six organised markets but explicitly recognises regional differences in definitions, studies, operating requirements, upgrades and cost allocation. In Europe, electrification meets ageing distribution networks and cross-border planning. Great Britain's former queue exceeded 700 GW and included waits of up to ten years, but that old queue was not demand or a needed build programme. Reform reordered projects; only realised connection times will show whether the clock changed.S07S08S09S18S19
China and India reveal a different scale. China is expected to account for nearly half of the global increase in electricity demand to 2030 while continuing very large renewable and network additions. High national build and utilisation do not eliminate provincial or node-level constraints. India has the fastest demand growth among the large regions in the IEA comparison, and its transmission plan provides unusually useful stage evidence: by March 2024, some inter-regional additions were commissioned, others were under construction or bidding, and another tranche had not yet entered those stages. That separation is more decision-useful than one combined plan total.S01S06S10S17
Southeast Asia combines industry, rising cooling demand and digital infrastructure with national-grid expansion and cross-border ambition. Its modelled average demand growth of 5.3% in 2026–2030 is close to India's fast-growth world, but its delivery institutions span several countries. The Middle East adds cooling, desalination and industrial projects, yet Gulf interconnection, import-constrained systems and conflict-affected markets should not be compressed into one capacity story. In both regions, a headline generation plan can be real while finance, interconnection, fuel, storage or network synchronisation still owns the in-service date.S01S20S21
Africa keeps the universal thesis honest. In 2024, an estimated 655 million people worldwide still lacked electricity access, more than 560 million of them in Sub-Saharan Africa. A connection can exist and still be unaffordable or unreliable, so the outcome cannot be measured only in installed generation. Grid extension, mini-grids and stand-alone systems each have a role, with concessional finance and utility viability affecting delivery. The supercycle is incomplete if it serves new industrial and digital loads while leaving first connection, distribution quality and basic affordability outside the frame.S11S22
Latin America adds hydro dependence, transmission distance and climate exposure. Brazil's system institutions forecast average load growth of 3.4% in 2025–2029, while the PDE 2035 reference case estimates roughly BRL 120 billion of transmission investment through 2035. The first is a forecast and the second a planning need, not an award or construction result. Curtailment can arise from transmission congestion, operational conditions, contract rules and changing hydrology. Comparing the region well therefore means following load, lines, storage, dispatch and drought together rather than assigning every lost unit to one missing asset.S23S24