Any concern in using this dated plugin?

Hello! Great plugin ?? just curious on if there is any security concern in using it, since it’s been somewhat abandoned. I really enjoy the output of it, and how it works, but just wanted to be sure. We have a plugin called WordFence and it’ll yell at me if plugins haven’t been updated after a year or so. While I understand it’s a general concern, for a plugin like this I can’t imagine there being anything to exploit, but want to be sure in case I need to keep my eye out on anything in particular. Thanks!