With all of the buzz and favorable attention surrounding decoupled Drupal at present, it can be easy to sidestep the pitfalls of decoupling Drupal without evaluating them intensively. Choosing to use Drupal only for its web service capabilities and as a content repository can endanger your entire architecture if you need Drupal’s front-end functionality or other critical functions that rely on the presence of Drupal’s default front end. Other risks apply as well.
Additional Point of Failure
Typically, monolithic Drupal implementations are hosted on LAMP (Linux, Apache, MySQL, PHP) ...