Hanna Barbera was killed by lower cost Asian animation houses like Sunbow. It was part of the equation along with advertising laws that fueled the toy based cartoons of the 80s that are the basis of so much of today's pop culture. Hanna Barbera had a serious monopoly. Imagine another decade of Scooby Doo, Josie and the Pussy-cats, and Super Friends.
Turner saved their ass.It was more cuz of them getting lazy. If it wasn't for the 90s, They would've died earlier........
…..At least until 1996 when they were slowly assimilated into Warner Bros Animation.