Best social media for build-in-public? (I will not promote)

What social media is best suited for building in public? Anyone has success stories, especially in cases where you didn’t start out with a large following? - X: easy to share things, but has gotten insanely political - BlueSky/threads: both seem pretty small? - LinkedIn: probably easiest for me personally, as I have a decent amount of connections - Reddit: very anti self-promotion. Starting a sub-reddit for my product might be difficult to get started? Which ones do you prefer, and how did you get started?