I’ve got the MH plugged into one of the mioXM usb host - so it has power, and bi-directional midi.
Most of my routing is by midi channel (*)
but somethings are being done as splits on a single channel.
eg I don’t need the full range of notes on my AE Modular (only does 5 octaves) or on my Squarp Rample - so I put these on 1 channel, split via notes - and then transposed to a ‘comfortable’ octave. - this is part of the role of MH for me.
also I’ve kind of run out of midi din plugs on the mioXM so MH gives me extras.
Finally, at times I use the MH as a kind of ‘extender’ by having a longer usb cable, I can put the MH closer to so some synths who’s midi cable can’t reach back to on the MioXM.
( just rearranged things so that’s not as necessary now :))
But honestly what I use MH for keeps changing over time - it’s a great utility, that helps me over little midi issues that occur from time to time.
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(*) my main issue is not that I have a lot of synths, but quite a lot of my stuff uses many midi channels.