You can have a dev team of 20, everyone has their own Lambda function running at all times so they can run their own branch without affecting others. When peop

You can have a dev team of 20, everyone has their own Lambda function running at all times so they can run their own branch without affecting others. When people go home, the dev Lambda cost instantly becomes zero. You can't do that with (virtual) servers, the cost is exactly the same 24/7. In some cases it's a good thing, some not. You can't also trivially handle Hug Of Death level load spikes. Not to mention Lambda uptime vs everything else.