The PITA is that I use RJ45 pretty much every day. It's not just a matter of "oh there's wifi everywhere"; 99% of wifis everywhere are not open, or are actually not connected to the networks I'm working on, or I need the physical connector to diagnose wire / networking issues; and the performance of wifi on Linux on refurbrished machines tends to be subpar and they tend to not allow for "developer mode" options (playing with your MAC, WPA supplanting, etc).

If Tesla, the actual Tesla, had given us technology instead of the thief ~~Elon~~ Edison, then perhaps we'd somehow have point-to-point wireless RJ45 that would function everywhere, and I wouldn't need the connector.