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I'm curious what features RHEL has over Debian, that make it worth paying for? I used CentOS for years, then switched to Debian, and it's been plain sailing, so I'm wondering what l could gain with RHEL.
I work with large clients and having a known corporation behind your product is pretty nice, besides that RHEL-compatible distros are still the only ones supported by a lot of proprietary enterprise software.
I'm not only a RHEL-convert, but an SElinux convert, and I think it's pretty neat. It can completely sandbox an application, but it does have a steep learning curve.
Red Hat are behind a lot of innovation within the entire Linux ecosystem.
Dnf have some features that large clients require, like history and rollback.
Debian apt (last I checked) started services on install, which can be very disruptive. It also means they sometimes uninstall similar services because there's a conflict.
Cutting edge podman/oci stuff, signed container images, and more.
And before you reply with "yes but Debian also has X", keep in mind that Red hat has probably been doing it much longer.