I dunno... maintaining virtual servers is still a lot of work. You have to

    * monitor lots of things like filesystem usage and CPU usage
    * build new machine images (as well as possibly new container images!) to keep up with security updates
    * tune autoscaling at multiple levels based on whichever server-based systems you're using
    * maintain a secure way for production support folks to log into servers to see what is going wrong or perform emergency fixes
    * build additional failover automation as well as what you'd already need for serverless

Serverless is a bit more expensive overall and less tunable, but there's just less to go wrong: much of the underlying server SRE work is handled by provider automation and engineers for whom that is their full-time job. So, I'm still pretty happy with it.