Fascinating. I also run a node over Tor and I have about 20ish peers. I didn't change conf settings from the default, so I guess that's less than the max?
If you are accepting inbound connections only on the Tor network (that is, your node can only be reached using your .onion address), then probably it is the same:
how well your .onion address is propagated into other peers' databases and the overall demand for Tor peers
You have about 10 inbound connections from Tor nodes. My node has 11 and has been running for a loong time without changing its .onion address, so it should be well propagated.
.onionaddress), then probably it is the same:.onionaddress, so it should be well propagated.