Springtime means rain, the return of flowers and, of course, Y Combinator’s first demo day of the year. During the well-known accelerator’s first of two pitch days from the Winter 2024 cohort, a covey of TechCrunch staff tuned in, took notes, traded jokes and slowly whittled away at the dozens of presenting companies to come up with a list of early favorites. From AI-generated music and grant applications to neat new fintech applications and even some healthtech work, there was something for eve...