CERN started transitioning to CentOS several years ago. SL was a Fermilab Computing product at this point. I also personally switched from SL to CentOS on my wo

CERN started transitioning to CentOS several years ago. SL was a Fermilab Computing product at this point. I also personally switched from SL to CentOS on my workstation years ago (partially because it took so long for SL7 to come out) .