The plots are very complex and involved. The story is cyclical, wherein the characters at the end of each season end up more or less where they began without having grown or changed. Typical for television.

The plot is always an important part of any show.

I didn't say it wasn't important. I said it was ancillary. The whole point in satire is social critique. The plot in satire is just a vehicle for that, it's not necessarily important in and of itself.

>That's just like, your opinion, man

There are other examples of shows that do fine without strong plots. One example from the top of my head is "The Chinese Restaurant" episode in Seinfeld. Little to no plot at all in that episode. Just a string of funny interactions between characters.