I've managed content on Drupal sites for several organizations over the years. Drupal 8 is certainly an improvement over Drupal 7, but I wouldn't recommend adopting D8 without reservations. The complexity and "box of legos" structure that can be built into anything imaginable is not the best fit for all organizations. A more turn-key CMS like Wordpress should be strongly considered before any organization commits to a Drupal build.
1. Endless customization possibilites: The structure of D8 is unrivaled in this area. If your organization has unique structural requirenments, or forsees the need to change strucuture in the future, D8 is a great choice.
2. Content moderation: D8 makes this very easy. The tool isn't perfect, but it works better than most moderation tools.
3. Security: D8 is among the most stable CMS platforms with frequent updates and a strong support network.
1. Complexity: The downside to the flexibility of D8 is that components, while easily initially built, require ongoing development tinkering to fine tune to the specific needs of the organization. This costs both time and money, and in many cases the end product is no better than an off the shelf component from a simpler CMS or 3rd party solution.
2. CMS interface: It's possible but difficult to limit the CMS components that are visible to different levels of editors. The default D8 view is the "kitchen sink", so many new editors can be intimidated by the CMS, hampering adoption.