I have 8 pinned tabs right now, with a 6 open tabs. It's a bit messy, but I like to have my work tabs pinned. When I worked my old job, I had like 10-12 pinned tabs. It was bad.
I currently have 24 tabs opened at the moment. I don’t usually count them, but then so that I could reply to this thread I had to go and verify the number. Now that I think about it, it is actually a lot, but then I have a lot on my plate that I do as well.