At some point, the game of chicken between networks and station ownership groups will end in a non-amicable way, leading to a major shift in how a network distributes programming in some areas.
Do I believe it is imminent? I have no idea. The incoming FCC chair's comments about station group and network affiliation negotiations might make a network hesitant to rip off that band-aid right now.
That said, NBC has shown in the past that it will cut off an affiliate it is frustrated with (WHDH) and terminate relationships with stations that threaten even a tiny bit of exclusivity for its O&Os (WHAG, WMGM). They have the infrastructure in Peacock for streaming and Comcast ownership to potentially fill some coverage gaps for linear distribution. NBC's broadcast operations are just one piece of Comcast's revenue pie chart.
ABC has a streaming infrastructure and ownership with diverse assets.
CBS is in a world of uncertainty. FOX is small but also has a history of trying new things. Stay tuned... or... I guess streaming now?