Space weather science is evolving fast, but many open questions remain. A good knowledge of solar precursors is a mandatory requirement for predicting space weather hazards well in advance. Solar observations from existing capabilities, mainly from space telescopes, are being extensively analysed even involving artificial intelligence. Nevertheless, the response to what triggers an eruptive flare instead a confined one, or to what will be the direction of the magnetic field vector when a coronal mass ejection arrives the Earth, among other questions, is missing nowadays. Next generation 4m telescopes provide a significant increase in observing capability, which should allow us to go ahead in the understanding of space weather science, increasing our forecasting capabilities. However, some changes should be made to achieve this goal, for example, in the observing schedules.