Thanks very much for your input.

We looked at Drupal 8 a little and spoke to some people in the organization who are using it.

Our concerns are:

1. the need for full-scale developers when working with Drupal. We don't want to the site maintenance to be dependent on hard-core coders long-term, since that requires always hiring programmers rather than lower-level web developers.

2. Drupal upgrades. We've heard that it's very difficult to upgrade between Drupal versions, as many of the plugins/modules don't get upgraded, at least not right away. So you can be left with a Drupal site that can't be upgraded without losing functionality.

Any comments?