It's simply not true that the main advances in generative art were made in the 50s and 60s and nothing new is being done now. Generative art is a huge, thriving field right now with thousands of communities and subcultures around it, using traditional coding techniques or visual programming systems like TouchDesigner. Honestly, just reading through this thread for yourself should be some perspective on this.
That's not even counting new tools like DALL-E or Midjourney, though personally I don't think we can write them off as uninteresting or low-effort. They're an exciting and powerful new tool, and like any tool they can be used to make art. Maybe as an artist making art that others could not also easily make is important to you, but that is not what makes art.