Last week, Lyft suddenly announced that its cofounders, president Logan Green and CEO John Zimmer, would step away from the ride-hailing company after 11 years. David Risher, a former executive at Microsoft and Amazon who has been on Lyft’s board since 2021, will take the helm later this month.

Lyft’s C-suite shuffle was sudden, but hardly surprising. For one thing, tech companies in their teens and tweens seem to be entering a founder flop era. Twitch’s Emmett Shear, Instacart’s Apoorva Mehta, Pinterest’s Ben Silbermann, and…