I work at Red Hat for the last eight years, long before IBM had anything to do with us, and I cannot stress enough how much IBM is *nowhere* to be seen in not just our day to day engineering jobs, but pretty much not even periodically. I know nobody at IBM, I have no email addresses of anyone at IBM, nothing we get in our inbox (and we get a lot) ever has anything to do with "IBM" in it, I have no links or access to any IBM-specific intranets or resources of any kind. They truly have stuck to their promise of not changing Red Hat; our support system is the same, we still respond to bugs, ask for SOS reports, and customer support people do collaborative screenshares, just as we were always doing, there's nothing different about any of that. There have been no top-down changes or decrees or anything I'm aware of that would change how we do any of that stuff.
as far as Podman it's all I use for all of my server environments and I like it a lot better than Docker. It's simpler without all the weird "Dockerish" things getting in the way. Not having a monolithic server hang the whole machine due to a misbehaving container is well worth it.