I wrote this comment for Drupal, I seems it's also true for Silverstripe. i'm sure it's a nice CMS, but doesn't give a modern experience when working with content.
"As a rule, if the CMS puts you away from your page and to a list of "posts" to edit with TinyMCE, it's not modern. Atleast in my book."
I thought SilverStripe was pretty good when I first looked at it. The framework it's built on is actually not as good as they hype (in my experience) and documentation lacking... but from the enduser standpoint it is a pretty good mix of ease-of-use and power. The blending of traditional concept of posts and versioning of a wiki - all centered around the mighty URL - was one of the best executions I've seen.
"As a rule, if the CMS puts you away from your page and to a list of "posts" to edit with TinyMCE, it's not modern. Atleast in my book."