I think we're definitely in an era of way more animated content than before, but a lot of it is pretty mediocre (including several shows named in that article). There's great stuff like Arcane, Big Mouth, Inside Job, Harley Quinn, Smiling Friends, and Bojack Horseman - but for every one of those there's also a Disenchantment, Velma, F is for Family, Hoops, Thundercats Roar, or the whole moundful of shoveled out low-budget animated content on Netflix. And that's not even touching the stuff that has long overstayed its welcome (Rick & Morty, The Simpsons, Family Guy, etc).
Some of it is probably nostalgia, and a lot of it is probably survivorship bias in the pre-streaming age, but I feel like the early 2000s had a
much higher average standard for animated content than today. It obviously wasn't perfect back then (Stripperella
), but that was the time period in which we had Venture Bros, Samurai Jack, Tarakovsky's Clone Wars,
ATHF, the original run of Futurama,
Home Movies, The Boondocks, Moral Orel, etc.