Install if You Need Better Security
If security is important to you, then you will want to install macOS High Sierra. Apple includes a ton of security fixes in this update and will continue to add security patches.
Yes, macOS High Sierra had a major root user issue that compromised security and Apple had to fix it twice, but it is now fixed.
The macOS 10.13.2 update also fixes Spectre and Meltdown problems that you've heard about during this last week. Everyone should install this update to protect your computer.
We also learned that Apple is adding a new feature that will check the Mac firmware weekly to see if there are any security issues and let you know if there are any problems. This message won't appear unless there is something wrong, and if there is you can see what you should do.
Users who are already on a version of macOS High Sierra, should make sure they install the new Security Update 2017-001 which fixes a major issue with security. Anyone who is on High Sierra needs to install this as soon as possible.
If you are using a Hackintosh or a are making your Mac Pro look like a newer model, you may not want to update until we know more about this, but for the average user macOS High Sierra brings a lot of security fixes.