[vsareto]

I personally think full stack is more popular than separated roles. They want to hire full stack because you don't really need an expert most of the time, and full stack smashes the two jobs together while paying less. This makes management easier on the surface because you can swing the entire team towards back end or front end work. And of the more capable full stack devs, you can get them to dive into expert topics as needed (JIT expertise).

[incrudible]

You do not need an expert most of the time, except when you do, at which point you better have one on board. You can mix and match, but keep in mind that context switches are expensive too.

[vsareto]

These are all true, however businesses continue to work against their own interests.

[incrudible]

That is debatable. In the grand scheme of things, politics included, it probably does not really matter. Otherwise, companies not employing this pattern should be at a competitive advantage.