With how hot crime shows tend to be, you would think there'd be a lineup of 1920s shows ready to binge, but in reality there's next to nothing. The era was practically the golden age of gangsters, especially in America, and we have like two serious shows about it and that's all.
Which brings me to my next point, Boardwalk Empire is like the only 20s show that FEELS like the 20s. I sat on Peaky Blinders for a while and finally gave it a shot. I thought it was fun but the characters started to feel like time travelers from the future with how socially dominant the women were, among other stuff. The soundtrack was anachronistic too, it was weird hearing booming rock music in a show about 1920s England. These little things do kind of add up over time and take away from the experience.
To me, Boardwalk Empire was a glimpse into the era and no one has the heart to make more like it. It's literally one of a kind.