Oboe, the AI learning platform created by Anchor co-founders and former Spotify executives Nir Zicherman and Michael Mignano, has raised $16 million in a Series A round led by a16z, with participation from Eniac, Haystack, Offline, Factorial, and notable angel investors including Adam D’Angelo, Garry Tan, Lenny Rachitsky, Mati Staniszewski,