In some instances, you just sort of decide to wing it and jam for a bit until you all find a spot that works. So, sometimes, you get to hear the ending get written live! (Though, usually, you just end up repeating whatever you’d do when you were practicing the song before)
Source: Had a band, had trouble writing endings sometimes.
In my experience, the songs with a fade out on the album usually get a real ending when played live. So they figure it out somehow
In some instances, you just sort of decide to wing it and jam for a bit until you all find a spot that works. So, sometimes, you get to hear the ending get written live! (Though, usually, you just end up repeating whatever you’d do when you were practicing the song before)
Source: Had a band, had trouble writing endings sometimes.