I would also say the quality of the jokes has declined over time.
Worthy of mention: Diablo II's Secret Cow Level. Initially a rumour among fans, Blizzard teased players and posted a screenshot of cow monsters on April 1st 1999 [1]. This joke soon became reality in the sequel, Diablo II.
IMO they used an April fool's joke as an excellent device to entice players. I find it to be genuinely humourous (killing herds of cows brandishing weapons), and best of all -- the joke was on us, it turned out to be a real thing in the following game. It is a classic level in Diablo II and one of the best areas to farm.
To this day it is a memorable joke, often recalled by gamers. It had even made its way into Starcraft (cheat code: "there is no cow level") for additional effect.
I still feel like Blizzard maybe does the best April Fool's gags, because they're willing to make fun of their own failings in a way Google or Microsoft brand people would never allow (see the Clippy thing on Teams). Blizzard's April Fool's patch notes often includes commentary about their own company's broken promises or mistakes.
That being said, after this past year, I'm not sure how funny I'll find Blizzard's mistakes.
I feel like at this point they are a psychological tool designed to create an impression of Google...
When I realized it was a prank, I didn't feel duped. I felt like the purveyor of the prank looked foolish in my eyes.
That's when I realized the true meaning of April Fools. They sure are.
/I know I do.