The most popular early TV sitcoms were I Love Lucy and The Honeymooners, both of which went on to mold the genre in their respective images. Over the last 50 years, sitcoms have grown and evolved into a wide range of programs, but the only radical difference between current shows and their predecessors is the absence of a laugh track.
Source：https://www.cbr.com/sitcoms-outdated-still-good/
