Drivers and value limits on Node Groups Let's say you want to use drivers to avoid the max value to be lower than the min value on a node group. As you can see the driver works, the value is changing, but is not limiting the max value.
Video: click to see the video
This could be a very good way to make better controls for nodegroups (smarter)
Once you have your thresholds set, disconnect the noodles on the inside of the group and reconnect them.  For whatever reason the values don't update properly while actively in use anywhere down the chain.