Joomla is a widely used open-source content management system (CMS); however, it comes with a few drawbacks. For starters, the learning curve is steep, even for experienced web developers, making it difficult for those unfamiliar with web development to use it to its fullest potential. Additionally, its functionality is limited compared to other platforms and its security is vulnerable since it is easily susceptible to certain attacks. Customizing Joomla is also a challenge, as it is not very customizable and lacks support for those who are unfamiliar with its features and capabilities.

When considering Joomla for your web development project, it is important to be aware of the potential drawbacks associated with it. This includes a steep learning curve, limited functionality, security risks, difficulty customizing, and lack of support. Taking these into account will ensure that you are better able to plan for and create a successful website or application.