Some shows even did this explicitly -- Space Ghost, Coast to Coast!, for example, was a remix of a 60s era show into an absurdist late-night talk show, using th

Some shows even did this explicitly -- Space Ghost, Coast to Coast!, for example, was a remix of a 60s era show into an absurdist late-night talk show, using the same animation assets and everything. And it spawned a whole genre of similar shows in the 90s/early 2000s that formed most of the original Adult Swim lineup.