I'd say use a static site generator (e.g Hugo) with a CMS (like https://forestry.io/).

This gives you the best of both worlds -- never have to worry about your blog going down due to traffic spikes, can host it for nothing (or next to nothing). With a CMS, it'll make it easy to collaborate with non-technical writers down the road.

It's not as easy or familiar as wordpress but much more robust traffic wise