Hello @MikeBerry,
We have thousands of downloads/usage of our repo daily. I myself used our repo just last Thursday to upgrade a client from MariaDB 5.5 to PS56, then PS57, and finally to Percona Server 8.0. It worked flawlessly. It is more likely that you are using our repo incorrectly than there is something wrong with our repo. If there was something truly wrong, we would see an incoming flood of support tickets asking what’s wrong. This is not the case, so let’s stop pointing the finger were we know the problem is not.
Let me reiterate something I said above, ‘yum update’ will not update major/minor versions of Percona Server. (yum update will work on patch versions) The package conflicts errors you are seeing is because of this. This is by design. In order to upgrade from PS56 to PS57 (for example) you must first uninstall all PS56 packages. This process will never be automatically done by yum. You must yum remove' or 'rpm -e --nodeps to remove the 56 packages, then use yum to install 57.