At my first startup (Vaadin), most of the learning happened at conferences. Investing ~ $20k many times over in expo booths got us to learn enough to find messaging and a product that started to resonate. After that, we got to 100,000+ developers using the product quite quickly. Luckily PMF was reached before the end of the runway and it all worked out. That was many many moons ago. Now we all have amazing analytics, but I still think they rarely tell us why those numbers happened. One nee...