@justoverclock I personally haven’t looked at Directus, but it’s worth noting that Ghost is actually classed as headless in the sense that it is decoupled (FE and BE). WordPress and Drupal are classic examples of legacy CMS in the sense that the FE and BE (Front-End / Back-End) need to work together to deliver content.
The huge drawback of this is speed. WordPress, for example, relies on PHP to render content. Owing to the nature of PHP, this is much slower than STG (Static Site Generators) such as Ghost, GRAV, and the myriad of others using flat files for storage rather than a database. PHP is notoriously S L O W when it comes to content delivery, but has been the defacto standard for years.
That landscape is changing dramatically, and WordPress et al are on borrowed time (in my view) as the desire for a faster website and higher Google rankings become increasingly important.