The most pessimistic estimate I've seen paid for by the cable industry is here:
https://ecfsapi.fcc.gov/file/10208168836021/FBA_LEO_RDOF_Ass...Only if each subscriber is using an average of 15-20 Mbps during peak times will about 50% of subscribers see some throttling.
Interestingly they only showed a single graph of average bandwidth over time from a cable company to estimate needs for SpaceX. No clue if they actually separated it out by time zone for each coverage area in their actual analysis.
