From what I've been able to learn from the Paleofuture blog, Rosie the robot wasn't used much as the focus of the show moved to George at work during the never ending battle between Spacely Sprockets vs. Cogswell Cogs.
At home, family situations ruled. The robots, Rosie and Max, seemed to disappear.
Darn. Why them?
Come have the time of YOUR life with me and the gang at Retro-daze.org.
It's amazing how a series with only 24 original episodes made such an impact on every generation thereafter. While The Jetsons used the future as a gag hook the show has an tangible charm that I've found hard to resist.
H-B became quite the cartoon factory, ready to try any number of ideas just in case it catches on with the public. "The Roman Holidays" (1971 maybe?) reminds me of "Where's Huddles?" from 1970. The draw style and storylines are similar. There was a consistency in the H-B product starting with "Scooby-Doo" from 1969.