Also unless you're very diligent about semantic markup and separation of content, presentation, interaction logic, the more complicated s site is the more diffi

Also unless you're very diligent about semantic markup and separation of content, presentation, interaction logic, the more complicated s site is the more difficult it is to port. I have run into this problem trying to migrate very old web pages or blog posts off of SaaS sites that are shutting down or just decaying. It's not just that complicated sites make it difficult to extract the content in the first place; it's difficult to publish that content on another site in a high-fidelity, and sometimes even readable, way. The hard part isn't keeping the old site (page) running (although that's not always easy either). The hard part is when you want to do something _else_ with that content -- more complicated means less (easily) flexible.