Beside that: I would suggest to try out on a ubuntu or debian (server) on latest (lts) version - RHEL has still a lot to do, automated testing has thrown out a lot of errors: 192 tests, 109 failures, 22 skipped
Glad to support for EL is coming along. Redhat Enterprise Linux brings a whole lot in the space of supported enterprise Linux with security/compliance, CVE response team, certifications for certain workloads and management tools for bigger environments (e.g Satellite)
Many of the bigger enterprises standardize on RHEL for, among others, the above mentioned reasons.
Looking forward to be able to migrate HestiaCP from currently supported OS to EL one day