It depends on what you mean by active. If you look at raw post counts, those don’t change all that much, even during election years. There has been a slow downward trend in post counts for years, which matches the general downward trend for almost all message boards everywhere on the internet. But we’re doing better than most.
If you are here specifically for political posts, those do tend to wax and wane with elections. But those are only a small portion of the overall posts here.
The SDMB is divided into numerous forums/categories (our old software called them forums, so most people use that term, where the new software calls them categories). Many of these forums have almost no political commentary and those forums are thriving.
It all depends on what type of posts you are looking for.