I redesigned this website that was on Joomla 1.5, and the web developer that was working on the website left. There was not an easy option to update the website to a modern version of Joomla. If I did update it the website would break. I transferred the website over to WordPress 5.0 so I would be able to maintain it better, and I am able to keep the website up-to-date. I am also in the process of transferring the website to a new host instead of keeping it on the cheap host that the client is currently using.
The new web host will offer better security, and better manageability.