Those of you who manage media under Linux are likely familiar with programs such as PLEX, Kodi, Emby, Jellyfin, etc. Many of these applications allow you to use your Linux server as a DVR to time shift over the air broadcasts using a tuner such as HDHomeRun. This works perfectly fine with the current ATSC 1.0 standard.
The new ATSC3 standard has been in test mode for the last several years. Broadcasters have been experimenting with it. Unfortunately, broadcasters have now decided to start using DRM. What does that mean? It means that if you are using Plex, Kodi, Emby, Jellyfin, etc. to record programs with Linux, it isn’t going to work with ATSC3 and DRM.
There is a Youtube video, that explains this entire situation. I recommend you take a few moments and watch it, especially if you are currently using a Linux DVR to time-shift OTA recordings.
Edit: The FCC actually responded, you can learn about that here:
The FCC wants to hear from you