I can confirm, this issue affects very few EPEL packages, less than 1%
(excluding packages that don't install on RHEL8 either) [0].  The
numbers were very similar when RHEL was 8.3 and CS8 tracked 8.4
content.  Most of those got resolved with the RHEL 8.4 release, but in
exchange CS8 now has that qt5 rebase which is coming in 8.5.

These problems are short lived (~6 months), small in number, and we'll
see even fewer of them over time as RHEL maintainers do fewer rebases
later in the RHEL lifecycle.  We also plan to make epel-next a fairly
seamless experience for CS8 users by having epel-release recommend
epel-next-release if centos-stream-release is installed [1].

[0] https://twitter.com/carlwgeorge/status/1396960645250158593
[1] https://src.fedoraproject.org/rpms/epel-release/pull-request/13

On Mon, Jun 7, 2021 at 10:53 AM Matthew Miller <mattdm@fedoraproject.org> wrote:
>
> On Mon, Jun 07, 2021 at 01:51:36PM +0000, john tatt wrote:
> > I mean: will Epel follow Centos Stream and in this case not surely be compatible with RHEL 8 ?, or
>
> Troy answered the overall questions separately, but... in practice, I expect
> this to be a very small issue. How often has it been that RHEL minor updates
> have required EPEL packages to be rebuilt, or EPEL packages built on the
> latest to not install on older point-releases of RHEL? I'm sure it happens
> occasionally, but it's not the typical case.
>
>
> --
> Matthew Miller
> <mattdm@fedoraproject.org>
> Fedora Project Leader
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--
Carl George