An optical perspective on early-stage active galactic nuclei with extreme radio flares L. Crepaldi, M. Berton, B. Dalla Barba, G. La Mura, E. Järvelä, A. Vietri and S. Ciroi A&A, 696 (2025) A74 Published online: 04 April 2025 DOI: 10.1051/0004-6361/202451512