It might be mathematically more confusing but it's still not very confusing. A couple of communities will become bigger than others if that's important?

We used to (still do) have hundreds of forums roughly covering the same news and discussions and we were just fine, e.g. HardForum, AnandTech Forums, Overclockers etc.

Nothing weird about having multiple communities with the same or similar niche. On reddit there are thousands of cat subs. r/technology, r/tech, r/hardware are largely overlapping etc. You might subscribe to all the technology subs or you notice which ones you like better...