From its first episode until 2009, the Simpsons aired in 4:3. It then adopted a 16:9 ratio, meaning 2010 Simpsons onwards has not been affected by the formatting on Disney Plus. But earlier episodes suffered from visual gags being cut off, most notably the below that went viral when the platform went live in November:

It’s rare for shows to be made or aired in 4:3 in 2020, but it also goes to show that some services would rather fill your whole modern TV screen with content rather than present media in its original format. Thankfully, this time, that will change.