I think there’s a benefit to having at least some “specialized” full stack devs. I happen to be one. I do mostly backend, which is technically my job, but occasionally I will pick up a front end ticket or one that incorporates back and front end.

Being able to see and understand how all the pieces fit together can be really helpful. If your entire team is made up of specialized devs, they tend to solve problems only with the tools they know. In my limited experience this frequently materializes as too much business logic in the UI or improperly implemented database integrations.

But I think the real value that full stack devs bring to these situations is not so much in the code that they can write but in the insight they can offer during the planning phases by helping the BA or whoever’s writing the tickets, clarify who’s responsible for what and how something should be implemented if it may not be clear to the dev working ticket.