XenForo is really outdated by now, it is not free or open source, and, let's be honest - it looks horrible compared to what users are used to. And although it can certainly be powerful, it leaves the impression of an abandoned project to potential new players, and we don't want that. Those reasons, and more, are why I'd like to suggest to migrate to a new, more modern, and free alternative. One that has become quite popular recently is Discourse and I think it would really be a good fitting alternative. Another alternative with a less modern approach would be Luna, but it is only developed by one dev, and thus development is quite slow. Whatever you do, I just strongly recommend not to stick to XenForo. Have a great day!