I've built several high-traffic e-commerce sites using it, none of them had a blog. Compared to something like Drupal it's a total pleasure to use.
WordPress has the ability for pages as well as posts (along with versioning of those items). User account management with permissions. Custom fields. What exactly does "true CMS" mean?
And I'd argue the easiest-to-use admin area out there, or so my clients lead me to believe.
Thats why wordpress is a blog and not a CMS because the only content it handles well are blog posts and basic wall of text pages. A CMS will not limit or put a definition on the content it manages, thats up to you. As an example, how complicated would it be to model the content of a store, store manager and then the relation ships between them, this is basic stuff for any other CMS.
If you don't show your clients anything else they will think its great. My clients say the same thing about wordpress, until they see something else then they wonder why anyone uses wordpress.
Which platforms? What was different about them that made them better than WP?
>because the only content it handles well are blog posts and basic wall of text pages
Unless you use post types. Now since 4.7 post types can apply to everything, including page templates. Have you tried using this and failed before you made your comment?
Interested in what other CMS's you would recommend? You aren't being very specific.