Drupal for the long haul: Maintaining and enhancing a large Drupal site for years
As a freelancer or agency, for some projects, we are hired to take it from design to launch and then the money runs out and we're "done". Maintenance is not in the project plan, so you move on to the next project.
Sometimes, though, you have a project that has the budget to sustain long-term maintenance and even healthy growth and evolution.