Every business is different. To offer your audience the best UX, you need a theme that can meet your unique business requirements. Unfortunately, with a generic theme, you’re forced to stick to the features that are already built into it. A custom-coded theme gives you the flexibility to add all the features you need to thrive. Plus, as your brand grows, you have the freedom to add new features that suit changing business needs.

One of the biggest drawbacks of generic themes is their poor security. First, many themes suffer from infrequent security updates.
Moreover, you never know who’s on the other side (and who has access to the code of the theme). Not to mention that you don’t even know how secure the code of the theme is!
A custom-coded theme allows you to significantly tighten the security of your website. That’s assuming it’s developed by a team with years of experience and dozens of projects under their belt.

Imagine you're running an established website, but need a custom theme feature... You can't really ask its developer to add it just for you? On top of that, you never know when they stop releasing new features altogether. Or worse - when they decide to stop releasing security updates. When this happens, you may be forced to ditch your current theme altogether. That's when you'll have to move over to an entirely new theme, redesigning your site. And, depending on the size of your website, the cost of such migration may be higher than that of developing a custom theme in the first place. With a custom theme, you are in control of the entire maintenance and update process.