The ELT's full capabilities won't come until sometime after 2024, when the ESO starts a second construction phase. It could easily be another few years after that before the telescope lives up to its expectations. However, it's having some positive side effects right now: the start of construction also marks the connection of its home, the Paranal Observatory (where the Very Large Telescope resides) to the Chilean electrical grid. That simple addition promises more reliability, lower costs and a reduced environmental footprint. Don't be shocked if more modest telescopes like the VLT benefit well before their larger sibling is ready for action.