Yea, sysadmin is a shrinking job field. Dev ops is eating heavily with what they used to do with config driven management of servers be it kubernetes, docker, terraform, puppet, etc.
Some one is administering the system. Whatever its title. The grip I hear from those who _do_ (and I agree with them) administer SystemD servers (note I did not say desktop here) is that when it fails, it is often very hard to debug because of too much implicit and hardly documented.
"the system" is shrinking. Our ci/cd, logging, monitoring, and alerting infrastructure is outsourced, our databases our outsourced, and our apps are deployed on stateless vms, a couple steps away from a managed container platform as a service. The only reason we aren't all in on container platform as a service, is because we support clients who deploy on vms.
Anything I touch that requires sysadmins is outsourced one way or another, either via managed services like rds or in house dbas.
If aws or in house dbas have strong opinions about systemd it doesn't impact me.