Thanks for your replies guys.
Here are the posts per day stats for the last two months, pre and post Discourse:
The new forum was launched in June 24th, hence the peak.
It’s growing slowly, let’s hope it keeps going up.
I added this plugin yesterday:
As a user, I like it when I see that there are actually people on the forum, even if they’re not currently writing posts. It tells me that the community is here and I think it can help growing a small community, because it tells users: “there are currenty people here that’ll probably read if you write now”.