People just tolerate the first five and a half minutes to get to the last 2 and a half minutes. Or at least that's what I do :).
I remember an ex girlfriend changing the station once right at about that transition. I felt like someone had just stolen my time, like they'd knocked over a card tower I'd been working on.
Isaac Hayes had a lot of 12-14 minute long epics. The rise and fall of the key change between the 70’s until the end of the 80’s could be blamed for songs being “longer” during that period as well.