Well... Data are useful if we can collect and process them automatically, a display means you can read instantaneously (essentially useless 99% of the time) but not store and analyze.
Some instantaneous data are useful, for instance before going out in the morning a quick look at the thermometer might be useful. Many others are not. For me a more expensive cable just to have a display on it is useless, eventually collected consumption data per device and makes a nice Grafana dashboard of them might be useful or just wasted resources, but at least they go on a flexible machine I already own so it's not an extra hw costs.
Some instantaneous data are useful, for instance before going out in the morning a quick look at the thermometer might be useful. Many others are not. For me a more expensive cable just to have a display on it is useless, eventually collected consumption data per device and makes a nice Grafana dashboard of them might be useful or just wasted resources, but at least they go on a flexible machine I already own so it's not an extra hw costs.