I wouldn't have much use for a phasing effect onboard a bass, but if there were a way to add some subtle chorus effect from the source instrument, I'd be in on that. My outboard is an 'always on' effect anyway, especially for fretless. Admittedly I have no idea how practical it would be to install, or if it would work in a similar way.
It's just so easy in this day and time to source and use an outboard bass-specific effect box than I'm imagining it was in 1976. Pretty wild that Alembic did this. Never seen another.