I also realized a trend regarding Hanna-Barbera cartoons during the 1980s. It turns out that H-B was a huge success before the 1970s. Well, it turns out that there were fewer new H-B cartoons during the 1980s, and many were either Scooby-Doo clones (same format, but with different characters), and series based on prime-time programs and real life comedy series, comic books, video games, toys, and other merchandise. The only original series I can think of that got released in the 1980s were "Foofur" and "The Biskitts", but I am not sure if there are any other original H-B series that decade. Many of the newer H-B series that decade lasted two seasons max. The only H-B series that launched in the 1980s and ran for more than two seasons were "Richie Rich" and "Smurfs".
Here are some of the H-B programs with new content during the 1982-83 season:
"The Dukes" (30 minutes)
"The Pac-Man/Little Rascals/Richie Rich Show" (90 minutes)
"The Mork and Mindy/Fonz/Laverne and Shirley Hour" (60 minutes)
"Scooby and Scrappy-Doo" Season 4 (30 minutes)
"Smurfs" (90 minutes)
"The Gary Coleman Show" (30 minutes)
"The Popeye and Olive Comedy Show" (30 minutes)
"Shirt Tales" (30 minutes)
"Speed Buggy" reruns (30 minutes)
"Superfriends" reruns (30 minutes)
Ten different H-B series airing in 1982-83. Plus keep in mind, that there was an animators' strike in 1982, so that could explain the repeats of "Speed Buggy" and "Superfriends" on CBS and ABC that season respectively.
1983-84, however, was a different story. Here is that season's schedule:
"Pac-Man" (30 minutes)
"The Monchhichis/Little Rascals/Richie Rich Show" (60 minutes)
"Smurfs" (90 minutes)
"The New Scooby and Scrappy-Doo Show" (30 minutes)
"Benji, Zax and the Alien Prince" (30 minutes)
"The Biskitts" (30 minutes)
"Shirt Tales" (30 minutes)
"The Dukes" (30 minutes)
"The Flintstone Funnies" (30 minutes)
"The Best of Scooby-Doo" (rerun package, 30 minutes)
It turns out that the total time for Hanna-Barbera content was reduced that season, possibly to give exposure to cartoons produced by other production companies, such as DiC and Ruby-Spears. Plus, there was "The Charlie Brown and Snoopy Show" on CBS that season too. It is also the season that Ruby-Spears gained momentum on Saturday mornings, and this was also the season that the foreign company, DiC, was starting to evolve, possibly a cost-cutting measure in the wake of the animators' strike of 1982.
The issue in the animators' strike was outsourcing animation work to foreign studios. It lasted ten weeks and was settled early in the fall of 1982. However, Hanna-Barbera's exposure was starting to fade away as the 1980s dragged on, as it was becoming too expensive to produce cartoons in the 1980s, as the Saturday morning cartoon genre was in decline during much of that decade.
"Superfriends: The Legendary Super Powers Show" (60 minutes)
"The New Scooby-Doo Mysteries" (30 minutes)
"Snorks" (30 minutes)
"Pink Panther and Sons" (30 minutes)
"Smurfs" (90 minutes)
"Going Bananas" (live-action, 30 minutes)
"The Biskitts" (reruns, 30 minutes)
"Shirt Tales" (reruns, 30 minutes)
As you can see, the total number of Hanna-Barbera programs on a single lineup, during some point in that season was downgraded to just 8 active shows, if you include previously cancelled series airing in reruns. Overall, there were only eight H-B series airing that season in some form, a drop from ten in the previous season. It is also the season in which DiC animations gained exposure, with new series "Wolf Rock TV", "The Get Along Gang" and "Kidd Video". It is pretty clear that H-B was slowly losing steam by that point, and also, two Ruby-Spears productions from 1983 were doing relatively well in the ratings, hence the renewals. One of them would continue production by R-S until 1988.