There are a few disadvantages to dovetail joints that should be considered before using this type of joint for your project. One disadvantage is that they can be more difficult to create than other types of joints. This is because the cuts required for a dovetail joint are more precise and require more time and effort to execute correctly. If you're not careful, it's easy to make mistakes when creating a dovetail joint which can ruin your project.
Another disadvantage of dovetail joints is that they're not as strong as some other types of woodworking joints. This isn't necessarily a big problem if your project doesn't require a lot of strength, but it's something to keep in mind. Dovetails are also prone to loosening over time, so they may not be the best choice for projects that will see a lot of wear and tear.