Since this is a kinda important piece of software, I'm surprised to see that CentOS 8.1 is still on 2.12. I can understand it not being on 5.0 and perhaps not 4

Since this is a kinda important piece of software, I'm surprised to see that CentOS 8.1 is still on 2.12. I can understand it not being on 5.0 and perhaps not 4.x (4.0 released last August). Are there stability or performance issues that have held it back? Have the interesting things been backported?