In the early 2000s I wrote my own CMS, of course using PHP 3 (!) and MySQL. Everything was so simple, flexible and… funny. I thought I would never switch because it was so simple to extend and the system was so responsive. What I didn’t realize at that time, was that the web itself was rather simple.
But at some point, in the middle of decade, everything changed: the Web 2.0 came into the scene. Web API, web services, all together with XML, RSS and feed aggregation. Rich web user interfaces and then the amazing user interaction and social networking or social-media. After getting used to the changes, I finally realized that my CMS is dead. There was no chance to keep the rhythm.