+1 for that. Anyone should use 5GHZ where he can
Indeed. Everybody is crying wolf here over Yosemite software. Understandable, in some way.
But this thread shouldn't be used as a garbage can for any old WiFi issue. We all should know running Bluetooth will create interference on the overcrowded 2.4 GHz band.
We all should equally be aware (and this fact is rather less known) that running a simple USB3 external device will also create ample interference on the same 2.4 GHZ band. http://www.intel.com/content/www/us/en/io/universal-serial-bus/usb3-frequency-in terference-paper.html
We all should as well be aware that the issues described in this thread may only be happening along with/ due to the use of specific older routers. Which makes reproduceability of the problems wellnigh impossible.
On top of that there is also an issue that has not been touched upon in the whole of this thread: Internet Service Providers and their tricky practice of Traffic Shaping: some providers, whenever they sense your computer is reaching a big link speed, will throttle your Internet connection, especially during business hours. Now maybe, just maybe, for some reason, Yosemite is a bit more speed hungry than Mavericks and you are with an ISP using Traffic Shaping. In that case you will be ok for a minute or 2, until throttling sets in.
Whats more, there is the issue of ipV6 barely coming into action globally, whereas Apple has had it built into Mac OSX for aeons. What clashes may this fact cause?
And the last one: DNSsec coming to bear globally, and not being implemented in most places/ servers yet.
I'm just a fairly average user with an interest in all of the above, but seeing all this i'm amazed at all I can still get to you over the internet.
Dear Apple devs, you have my respect, please deserve our sympathy as well.