Paraphrasing my favorite bookstore bookmark: Danger, the next year may be odd.
Steve K9ZW has a posting that brings home a good question. Is your on-line data secure? (Also, the post from K9JY.) What if your hosting service melts down? Some folks have been able to migrate their blogs and web sites when that has happened. But if you're like me, using a proprietary service such as blogger.com, you may not have that option.
That's an argument for putting anything of long-term value onto a site using industry standard software - preferably open source. But even open source solutions will fade after a while. You can always go back to bare HTML, saving your own off-line backups. (Even then, what are your choices for archival backups?)
It's something to think about.