I mean this post has 1200 upvotes. Considering most people don't engage with the voting system that makes me think that there's a decent amount of people here. At the very least it means there's a lot of people here who engage with the community. More come every day. If this post were on Reddit, it would be on r/all right now. That's not bad for a community with a fraction of the users.
I think that in 10 years this place will be doing alright. I think the growth that's happened in the last few months won't last, but I think that growth will still steadily happen. The reddexodus doesn't happen every day but with most social media platforms shitting their geriatric pants more and more lately, I think a consistent flow of refugees will come here.