New study with a Drake Equation style estimate of current technological civilizations in our galaxy. It concludes there should be 36 civilizations about as advanced as ours at any given time, but they should be, on average, 17k light years apart. The assumptions in the estimate, by necessity, are all based on our own world, life, star, etc, so, its a big swag.
https://phys.org/news/2020-06-intell...fe-galaxy.html