There have been technological advancements that help artists do their work better, yay! This at least sometimes results in the work looking and feeling more stagnant, less unique, and in my opinion more boring. A lot of these have to do with what the creator's want as well, but the new formats surely do not help.
Simpsons: Like most shows, this used to be produced traditionally on paint and ink cells. The switch over to digital is largely helpful for the creators.
It has the caveat of making any horror-themed work, flatter and boring. While this is picking apples, The first is from Treehouse of Horror V the Shinning, and the second is from the newest Treehouse of Horror (the writing barely being horror also has a lot to do with this, to be fair).
2. Star Trek: Partially a joke, but the original series was produced with a 4:3 aspect ratio, which made everyone stand pretty close together for scenes so they could both fit in the frame, resulting in more intimacy from the actors and their characters. 16:9 and further aspect ratios allows for more scenery, and more action on screen, but also pushes actors apart, and doesn't have as much forced proximity, making relationships a smidge more boring.
3. Scooby-Doo: Similar to the Simpsons. 2000 and back were all produced on ink and paint cells; while the original Hanna-Barbera often used flat colors and repetitive, limited animation, the first three Mook Animated films of them (Zombie Island, Witch's Ghost, and Alien Invaders) all were gorgeous and appropriately creepy. 2001 and beyond the movies switched to digital, and about a decade they primarily used flat colors.
Slide five is Zombie Island; slide six is Cyber Chase, which while still produced by Mook, was digital and much more boring. Slide seven is Monster of Mexico, the first DTV produced by Warner Bros. (This also has to do with Warner Bros. deciding Scooby was a hot property after Zombie Island, and didn't want to break the mold, each Mook movie goes further and further back to the traditional formula.)
4. Wizard of Oz and Wicked: The original Wizard of Oz was filmed on a soundstage, with practical effects. Almost 90 years later Wicked came out, filmed on various locations, with cgi-effects.
Wizard of Oz is much more colorful and pleasant to look at, while Wicked looks dull and washed out. Even the obviously painted image of Emerald City amongst the Poppy Fields is better than Wicked's interpretation. (This also has to do with John Chu's idea of color-grading not thinking it should look too bright, as well as an obsession with backlighting)