There are more contributions now than there used to be, but if no one has posted in a day, I try to make a post.
... I still post most days.
It takes a large userbase. I remember on The Old Place a community might need 2 or 3 thousand subscribers before it became truly self-sustaining. The more esoteric and obscure the knowledge or material needed to post, the more subscribers you need - meme communities can hit it at 2-3 thousand, while others, like history communities, can reach 5k and still be reliant on a small number of contributors.
When I was a kid in the early-mid 2000s, knocking on the door was always a daunting prospect - people sitting out on their porch or steps were much more approachable, and much more the norm.