I don’t remember the earlier thread, but it was more about people reading from ring binders or iPads rather than relying on memory. The song went along these lines:

It’s a damn tough life full of toil and strife, we wailing men undergo
And we don’t worry none when our songs are sung, how hard it was a show
For we’re bar room bound for another round, with our gullets taught and free
And we don’t give a toss about the verses lost, they just slipped from memory

Going down the Club, my brave boys, Rose and Crown is where we’ll be
But Homeward Bound and the Holy Ground, they just slipped from memory

Once more we’ll wail our miserable tales, of grief and death and woe
Of calamities on the old high seas, and grappling ‘gainst the foe
Both night and day we’ve wailed away about good ships lost at sea
But most still sail where I have failed, to remember that verse three

We learnt our craft both fore and aft, but mostly below decks
It’s a tragedy but for the life of me, I can’t remember what comes next
There was something about ‘rant and rout’ , or did I just do that verse?
Something, something, I’m mumbling, maybe best repeat the first....

There is more, but ironically slipped from memory...