At some point they were being made fun of for being slow, old fashioned, stuck in the early 2000s. They have to be obviously for stabiliy, but you know word spreads. So around RHEL 7 time they went all crazy trying to show the tech world they are still hip and cool, looked around, saw what the cool kids were talking about -- Docker. So they got themselves some Docker. So now it is Docker, Docker, Docker all day every day.

Naturally now it is uncomfortable to say "yeah well LXC is there, can use that as well or instead of Docker", but that would kind of backpedaling on their Docker bet by having something that competes with it. So they are stripping it out.