Lesson learnt in 04 and future perspective

The fourth observing run (O4) of LIGO-Virgo-KAGRA is now ongoing, relying on the most sensitive network of gravitational-wave interferometers to date. In this talk, I will highlight in a multimessenger context some of the most recent astrophysical findings and their implications for massivestar evolution, supernova theory, compact binary populations, and the search of electromagnetic and cosmic-ray counterparts of gravitational-wave sources. In addition, I will discuss the future perspectives of the field in view of the forthcoming gravitational wave observations. Extended theories of electromagnetism and their impact on laboratory experiments and as-