There is some really good discussion on this in the 2018 thread, but I'd really like to see a ROS 3 that conforms a little more to the more widely-used alternatives to the stuff they had to roll for themselves back in the day.
Agreed. There are countless things in ROS1 which feel like a less polished version of X. I believe ROS2 is trying to use a more commodity stack for IPC and serde.