It's too late. Drupal 6 turned me off ever using a CMS again. Now I purely use html files in folders with other files in folders. It's great. No maintainence burden, no attack surface, no resource eating always running programs or database that can get corrupted or otherwise in a bad state. And especially no migrating to the new version and everything breaking (especially with non-core stuff).
No maintenance burden except when you need to add a menu item and have to edit hundreds of pages.
Sounds like you don't have a good use case here though - you don't need editorial workflows, shared asset libraries etc?