Signal Delay
It's not just football - my wife and I support one of the premiership rugby teams. We each use a radio with earpiece to get the excellent commentary from the local BBC station whilst sat/stood in the ground watching the game: the commentary really augments the experience. I bought a DAB radio expecting the crystal clear commentary, which I duly got - but the 2+ second delay while the signal gets digitised/compressed, fed through some network or other and then decompressed on my radio made the listening very frustrating - so I switched back to my trusty AM/FM radio and get synchronised visual and audio!