Ask HN: Debian as alternative to RHEL/CentOS/Fedora what would you miss?

In light of IBM's involvement and the price tag on RH. The days of IBM enterprise Linux with a hefty price tag and crippled community editions is not that far.

As a HPC admin, we have been standardising on CentOS for a good while and are nervous about this development. Would Debian be the savior and become the beacon of "Open Linux"? What would you miss or gain by moving to the Debian world?