We chose to use a light CMS, grav, instead of a big one like Drupal or Wordpress
there are a lot of reasons for that, starting from the use of .md (markdown) files which allow us to easily download, backup and change the CMS if needed, shifting to another HTML-compatible system.
But then, why not to use an SSG (Static Site Generator) like Hugo or Jekill instead? Again, a number of reasons.
An article summarise this choice