https://screenrant.com/the-simpsons-best-animation-format-changes-ranked/

The Simpsons' has utilized numerous other animation styles over the years as a means of parodying and paying tribute to animation history.

The Simpsons Season 35 Episode 13’s Big Animation Change Is Really Dark (But It Works) (https://screenrant.com/the-simpsons-season-35-episode-13-stone-age-animation-change-good/)

The Simpsons season 35 episode 13 featured a radical change to the show's usual animation style and tone, but this big aesthetic shift succeeded.