Startup architecture and a 500+ engineer org's architecture are fundamentally different. The job titles are the same, but wont reflect the actual work.
Of course that's always been the case, and applies to the other jobs as well. What a "head of marketing" does at a 5 person startup has nothing to do with what the same titled person does at Amazon or Coca Cola.
I've also seen many orgs basically retitling their infra teams members as "devops" and call it a day. Communication between devs from different part of the stack has become easier, and there will be more "bridge" roles in each teams with an experienced dev also making sure it all works well, but I don't see any company that cared about their stack and performance fire half of their engineers because of a new fancy trend in the operation community.