The other way of dealing with this is to put normal services in an autoscaling environment like Kubernetes. You don't have to go as far as Lambda to get the ben

The other way of dealing with this is to put normal services in an autoscaling environment like Kubernetes. You don't have to go as far as Lambda to get the benefits. Moving to autoscaling is really more of a cultural problem than a technical one. If teams are used to being able to reserve excess capacity they will be wary of autoscaling -- what if they try to scale but there is not capacity to do so because other teams used it up? People need to trust that the system will give them the capacity they need or they will continue to overprovision.