I have a coworker who is possibly 1000 times more productive. He went from working on 1 or 2 side projects on his own pre-AI to working on 10-15 side projects at the same time, each incredibly complex and finishing them in a week. He build Android apps for controlling drones, then to 3D-rendering, then to making games, to creating various types of compilers, to creating entire AI run-times for phones. This is on top of running out of work to do so he's been doing side projects at work. He rewrote an entire team's product in a week and made it faster with less lines of code. Then he created his own language, made an AI music generator, an AI thing that compresses KV cache, multiple MCP servers for products, and then a global MCP-type server that incorporates a while slew of internal services kind of like a one-stop shop, and it has gained traction within our company.
It's insane and almost comical the level of productivity he has achieved with AI.