How did you measure that? I simply don't believe it. I have run the same Pi3 with both FreeBSD and then with Raspbian, and while I didn't perform any measurements, both seemed adequately fast to me.FreeBSD on RPI3B is 10x faster than the raspbian stuff!!!!!
Of the two Rpi I have in production, the first one absolutely needs WiFi (there is no wired Ethernet nearby, and trying to run a wire would be impractical, as it would take drilling through 4" of concrete twice, and running an underground conduit). The second does not need it, but it would be a nice to have. Alas, I can't use it right now anyway, since it needs an external antenna (with a small connector and coax cable), because it is mounted in a metal box.I don't want embedded WiFi chip on my embedded computer.
Well, I happen to want and/or need it.Why pay for something you don't want or need.
In some cases I could use a USB WiFi. Problem is: Those use extra power, and it is one more thing to keep track off, buy, and configure; the "native" WiFi works right out of the box (with Raspbian). In other cases, I can not use USB WiFi: On a RPi0W there is only one USB port, and it is already in use (to interface to hardware).Plus you can use a supported module ...
See above, the generalization is just nonsense. In some cases, wired Ethernet simply isn't available, in my examples because of physical isolation (the RPi is many dozen of feet away from the nearest wired network, with two concrete walls), or on a RPi0w due to lack of Ethernet hardware. And using a USB WiFi will sometimes work, sometimes it is a hassle, and sometimes it won't work.It does not matter to have wifi.
Ethernet works, and you can use dongle usb wifi.
In my case, it's better to have Raspbian that actually works, instead of FreeBSD that would not even work for my two installations.It is better to have BSD than anything else.