I’ve made some use of Kirby CMS. It’s a really well put together flat file CMS. It takes some coding out of the box to get it set up as desired, but then it’s a pleasure to use. Advantages of not having a database include simpler setup, and the ease of version control of the whole site. Statamic is a similar option, though I’ve not spent any significant time using it.
Being extremely flexible as well as user-friendly, it enables any entrepreneurs to focus on their products and it’s promotion. It is relatively easy to manipulate and use and offers hundreds of free and premium themes to choose from. What’s great is that Shopify also offers the user the option to sell their products through social media, by integrating a Buy Now button or even using the POS system.
Just imagine Medium shuts down as did Posterous back in the days (which was a similar service). You will not necessarily lose all your content but all the SEO rankings you ever created. To get it right you need to publish on your own domain name and preferably on your root domain (www.yoursite.com/blog) and not a sub-domain (blog.yoursite.com). This has numerous SEO advantages.