Earlier quoted context omitted.
Don't forget you can still get a DTV OTA antenna and watch live TV with a much much better image quality and without cable's delay. Admittedly, in can take a bit of effort finding a location to place the antenna for best reception for your location, but so worth not paying for cable any longer. Sports is the primary reason for me messing with this, but it is definitely worth it.
Note that they have added DRM to the ATSC 3.0 standard, and its being implemented quite widely. This means that you'll be unable to freely record time shift sports using applications like MythTV, etc.
Here's a list of current ATSC 3.0 channels, with an indicator for the encrypted ones: https://www.rabbitears.info/market.php?request=atsc3
For now, most network affiliates that air an ATSC 3.0 signal must simulcast the primary video programming stream in ATSC 1.0 format. So most primary channels are still available without DRM. [1]
[1] https://www.ecfr.gov/current/title-47/chapter-I/subchapter-C...