Exactly this, I lead cloud consulting + app dev projects. Before I would have staffed my projects with at least me leading it and doing the project management + stakeholder meetings and some of the work and bringing a couple of others in to do some of the grunt work. Now with Gen AI even just using ChatGPT and feeding it a lot of context - diagrams I put together, statements of work, etc - I can do it all myself without having to go through the coordination effort of working with two other people.

On the other hand, when I was staffed to lead a project that did have another senior developer who is one level below me, I tried to split up the actual work but it became such a coordination nightmare once we started refining the project because he could just use Claude code and it would make all of the modifications needed for a feature from the front end work, to the backend APIs, to the Terraform and the deployment scripts.

I would have actually slowed him down.