It's something I have disabled on my phone - My 5Ghz wifi is strong in all areas of my house, bar my bedroom. If I'm in there and watching the latest youtube video in 1080p@60fps (because why not?), I don't want it going "oh, the wifi signal to the current network is weak, lets switch to the (admittedly brilliant, because the nearest base-station is right outside my window) 4G connection and consume an entire month's allowance." In cases like that, I would prefer for the connection to die, (and I get a pop-up notification about this if/when it happens) to allow me to kick it onto the 2.4Ghz wifi, as it is somewhat reluctant to switch automatically ("but I can still just about connect to the 5Ghz, lets keep trying to reconnect to that!")
Biting the hand that feeds IT
