Sort of. The change is merged now. I am willing to release it this week in 2.19. I was just thinking whether it is worth for you waiting even a bit more to get a newer pulp-container y-version which will contain Artifactless Manifests. This might land in 2.20 (2-3 weeks from now).
It might be beneficial to have Artifactless Manifests included in the build because we expect performance gains since Pulp will no longer need to look into the filesystem to serve or store content. Instead, data will be available immediately from the DB model. We are introducing django management commands for migrating data from the filesystem to DB models (useful for users who do not want to run blocking migrations causing potential downtime).
If build-wise we’re okay, I say we get the newest pulp-container possible into Katello 4.13. So yeah I agree with you @Odilhao , we can get pulp-container 2.20 in when it’s released. If it’s a couple weeks from Katello 4.12 GA we should still be okay to comfortably upgrade to it.