In my opinion, the answer depends on rephrasing the question. If your question is "Should I ditch WP for Ghost for blogging only?", then the answer may be Yes.

In my opinion, the answer depends on rephrasing the question. If your question is "Should I ditch WP for Ghost for blogging only?", then the answer may be Yes. But if your question is "Should I ditch WP for ghost and even though I am starting with a blog right now, I may need many additional features a.k.a Plugins in coming future", then the answer is Most likely No. It is hard to beat the maturity and ecosystem of WP functionality and plugins which is the biggest reason why WP is so popular.