I found this very interesting notation in Wiklund's first piano concerto, final bars of movement 1 (the transcription for two pianos):
See the final left-hand bars: the low E is sustained over a clef change, then into the next bar where the two clefs are stacked atop each other, both applying to one note.
I have never seen that notation before and I doubt that many music notation programs would support it. So that sparked my curiosity; how would a modern musician notate the same passage? Is the only alternative to move the high B to the right-hand stave?