[namibj]

You're forgetting wireless access networks with varying signal strength (home wifi; phone in the basement).

[oasisaimlessly]

Wifi does some amount of retransmits of dropped packets at the link level.

[namibj]

That's about local link loss; you at best get buffer bloat from confusing the wired desktop and the wireless laptop that share a 800~1200 Mbit/s DOCSIS downlink.

Or worse, different service tiers from a neighborhood getting bundled via CGNAT; though that's a clear argument for IPv6.