Code change:
intensive, and reducing acknowledgement frequency reduces this cost at a data sender. <del> Severely asymmetric link technologies, such as DOCSIS, LTE, and satellite links, connection throughput in the data direction becomes constrained when the reverse bandwidth is filled by </del> <ins> For severely asymmetric link technologies, such as DOCSIS, LTE, and satellite links, connection throughput in the forward path can become constrained when the reverse path is filled by </ins> acknowledgment packets.  When traversing such links, reducing the <del> number of acknowledgments allows connection throughput to scale much further. </del> <ins> number of acknowledgments can achieve higher connection throughput. The rate of acknowledgment packets can impact link efficiency, including transmission opportunities or battery life. </ins> As discussed in implementation however, there can be undesirable consequences to congestion control and loss recovery if a receiver

Related discussion:
text: I tried to work in what I thought were the important parts of Gorry's suggested text, PTAL if I captured everything.
It's also true that for many RF media, the performance of the forward path can be impacted by the rate of acknowledgment packets when the link bandwidth is shared.
“Severely asymmetric link technologies, such as DOCSIS, LTE, and satellite links, connection throughput in the data direction becomes constrained when the reverse bandwidth is filled by acknowledgment packets. When traversing such links, reducing the number of acknowledgments allows connection throughput to scale much further.” I’m going to push back again on this as largely wrong. Links such as DOCSIS, LTE, satellite and WiFi are asymmetric. But it’s not just that the design decisions made for these types of link resulted in asymmetric capacity (throughput limit), the designs also share the capacity, and it is important to mitigate the impact on that sharing of capacity, than purely thinking of it items of bytes/sec of capacity used. A lower feedback rate can help avoid inducing flow starvation to other flows that share resources along the path they use.On mobile devices sending data consumes RF and battery power and is more costly for a host of reasons not just asymmetry when present.
NAME -- I don't follow why you say that the statement is wrong. It seems to me that you think that the statement is inadequate. Would you mind responding here with some text you would prefer instead, and I'm happy to wordsmith and turn it into a PR?
I suggest some text something like: For some link technologies (e.g., DOCSIS, LTE, WiFi, and satellite links) transmission of acknowledgment packets contribute to link utilization and can incur significant forwarding costs. In some cases, the connection throughput in the data direction can become constrained when the reverse bandwidth is filled by acknowledgment packets. In other cases, the rate of acknowledgment packets can impact link efficiency (e.g. transmission opportunities or battery life). A lower ACK frequency can be beneficial when using paths that include such links.
NAME -- Is the text proposal in the issue enough for you to make a PR?
This is much better.