You are right businesses don't care about the stack unless they have already setup a stack. Then next time they would want to hire someone experienced in that.

You are right businesses don't care about the stack unless they have already setup a stack. Then next time they would want to hire someone experienced in that. They won't go for generalist. Even though they might be using that resource to jump on different tech stack which was not even mentioned in the JD. Means they hire specialist of one domain and then use them to work on other domain as well. But they will be reluctant to hire generalist from the start.