That might just be a matter of taste. I probably watched way more shows from those decades, but some of my all-time favorites have been released in the last few years. Mob Psycho, City, Frieren, Dungeon Meshi and Dandadan are probably the best adaptations I could have hoped for and among the best productions I've ever seen. There are plenty of lower budget releases I love as well, like mono, eizouken or bartender.

Sure, there's stuff that just doesn't get made anymore like hand animated original mecha and original anime in general have been declining, but at least for me there's more to watch than I really have time for.