Sometimes the identity of the messenger is important.
Twitter was super easy to set up with the API to periodically tweet the output of some automated script: a weather forecast, a public safety alert, an air quality alert, a traffic advisory, a sports score, a news headline, etc.
These are the types of messages that you’d want to subscribe to the actual identity, and maybe even be able to forward to others (aka retweeting) without compromising the identity verification inherent in the system.
Twitter was an important service, and that’s why there are so many contenders trying to replace at least part of the experience.
Ok so most monitors sold today support DDC/CI controls for at least brightness, and some support controlling color profiles over the DDC/CI interface.
If you get some kind of external ambient light sensor and plug it into a USB port, you might be able to configure a script that controls the brightness of the monitor based on ambient light, without buying a new monitor.