Later, the cable operators began to carry FM radio stations, and encouraged subscribers to connect their FM stereo sets to cable. Before stereo and bilingual TV sound became common, Pay-TV channel sound was added to the FM stereo cable line-ups. About this time, operators expanded beyond the 12-channel dial to use the "midband" and "superband" VHF channels adjacent to the "high band" 7-13 of North American television frequencies. Some operators as in Cornwall, Ontario, used a dual distribution network with Channels 2-13 on each of the two cables.
You do not have to worry about who is the best cable TV provider in the country. Instead, it is best to do your research to identify the best cable TV service providers near your location. This is because even the top five cable providers are not offering their service in all parts of the country, which means that you will have to initially find the cable TV providers that are operating near you.
Already mentioned in another thread, but, SlingTV has good sports coverage -- otherwise, we use OTA for, e.g. PBS -- but, beware that the SlingTV WebOS client (runs on LG 4K TVs) is unreliable with some sports channels. (With others, it works fine ?!) The SlingTV WebOS client needs to be robustified. SlingTV works fine via web/chrome/Windows10 and on IOS.
The question of "when does it make sense?" can easily be rephrased as "how much money can I save?" and one of the biggest factors will be the price difference between combined internet and TV service or just internet. These are also the options that vary the most widely based on where you live, and the availability of promotions or contracts that can keep prices down for a short time.