If you use purely PaaS offerings (or FaaS as well), then you also don't really need sysadmins. That's not to say that you can get away with knowing _no_ sysadm

If you use purely PaaS offerings (or FaaS as well), then you also don't really need sysadmins. That's not to say that you can get away with knowing _no_ sysadmin skills in these scenarios, but you don't need to have someone on staff who knows the ins and outs of Cassandra or Mongo or whatever you're using. In awful workplaces with high turnover, it's worth it for management to opt for these managed services so that when the overworked tech lead decides to rightfully bail on them, she/he doesn't leave them in the lurch. (Note: I'm not defending these workplaces, but just explaining that when they can't keep adequate in-house talent to manage their own services, it makes financial sense to outsource it, and pay the "cloud tax").