I've added Vulkan to our game (0 A.D. https://play0ad.com/) in the beginning of 2023 and game version with its support was released in the beginning of 2025. Since that we've collected many different feedbacks and issues with Vulkan: our implementation, driver issues and hardware problems. I'm going to share most significant ones for us including device selection and creation, RPI visual artifacts, "remote" debugging and performance fluctuations.