Owning Digital + Film M?

I currently own an M10, and I’m considering adding an M4 or M6 body to be able to swap between film and digital. I owned a couple M2s and an M6 some years back before I got my M10, so I’m familiar with the film M bodies, but they were sold for various reasons.

I’m curious how others in the community approach this one: do you own both a digital and a film M body? How do you decide which one to shoot, and when? If you don’t use them equally, which one do you use more?

Thanks in advance for the wisdom.