The EL-8 non-default repo Code Ready Builder is primarily targeted at
developers, but it looks to me like it's going to be a required repo
for a lot of EPEL-8 users, particularly those using interpreted
languages.
As an example, today I built perl-Expect for EPEL-8
(
https://bugzilla.redhat.com/show_bug.cgi?id=1744512). This has a
dependency on perl-IO-Tty, which is in Code Ready Builder. The
dependency isn't just a build-time dependency though, it's a run-time
one too. So it seems to me that the Code Ready Builder repo will be
required for lots of EPEL-8 users, just like the optional repo used to
be for earlier EL versions.
Paul.