Hey there! Good question about CentOS 9. While CentOS 7 is a well-established and widely used OS, CentOS 9 is a newer release and may not have as much support yet. Plus, since CentOS 7 has Extended Lifecycle Support, many folks are sticking with that for now. But it's worth keeping an eye on CentOS 9, as it's got some cool new features and improvements that could be a good fit for your future projects. Just keep in mind that CentOS 7 will reach its end of life, so eventually, you'll want to make the switch to a newer version. But for now, it's all about finding what works best for you.