I'd never heard Monk's version of this until it was pointed out to me by my ever-favorite lit-blogger Patrick Kurp.
The similarity to the finale of Mahler 9 has been pointed out many times. When I was at my most ambitious with the old chorus, I thought of taking the whole text of Abide With Me (every verse) and setting it as a hymn to the music of Mahler 9's last movement. But you'd certainly need a 50-member chorus of steel in order to make it happen. Some things are probably best left dreams...but the dream abides.