But it increases points of failure. What if one or probes in the chain break for some reason? I guess you build in redundancy, but it's not obvious to me that

But it increases points of failure. What if one or probes in the chain break for some reason? I guess you build in redundancy, but it's not obvious to me that the added complexity - probes have to send and receive instead of just send - is worth the benefit. I really have no idea about this space though.