[Kojak]

They cost a lot of money to make, scheduling the talent can be a nightmare for a relatively short lifespan. Hence why it's done sparingly (or with a strong marketing budget/campaign behind it). I don't even think America does it that often now compared to the 70s/80s/90's

No they stopped doing those long season promos ages ago. But as a kid, those really long promos started airing usually when the new tv season started in September.  Back in the day, the new season kickoff was a huge event. Especially after a summer of repeats. All the new shows and season premieres would start on one night.  I cant remember if the networks would all start on the same night or not.... It was a big event for the network. So at the start of each night when it hits primetime, (8 EASTERN,
7 CENTRAL AND MOUNTAIN!) before the new shows would start, viewers would get a new campaign song and they would air those cheesy OTT nearly 2 minute long promos to kickoff the autumn television season. So the graphics and idents would be new and fresh each September. Television is vastly different now and network television isnt has popular or power as before.

Do you remember, Mouseboy, the Brotherhood of Man thing NBC did for the Super Bowl about 10-11 years ago? I think that was the last big promo any of the networks did. Very cheesy but very well-executed, IMO.

www.youtube.com