Comment by toast0

64k probes is a lot, but it might be reasonable if you're trying to get something like wireguard connected between locations that are behind CGNAT, send 10 probes a second for a couple hours and then remain connected for a long time. Of course, CGNAT might split your traffic over multiple IPs and then the math is terrible.

If you need to send 64k probes to get p2p and you want to make a 15 minute call, it probably doesn't make sense, but it's probably worth trying a bit in case you catch an easy case. Not that p2p is always better than going through a relay, but it's often less expensive.