Space SOHO, a joint ESA and NASA mission, has been continuously observing the Sun from L1 for 30 years. It pioneered looking beneath the photosphere with helioseismology, precisely measured TSI and variable EUV, and became the foundation of space weather forecasting with the LASCO coronagraph. Along the way, with citizen science, it discovered over 5,000 comets and inspired Solar Orbiter, Proba-3, and the future Vigil.