I started to use RedHat 7.3. Although it has come a long way and I really like how all the Linux Distributions are turning out, RedHat 7.3 makes me mad for only a few reasons:
Device::SerialPort on Redhat 8
The end of life for Redhat 6.2 security updates happened at the end of March. Because of this, I have been upgrading our remote buildings with Redhat 8. Since each building has a T1 router, I wrote a small program to log the routers messages to a text file.