I see that there is a "Salt" module that will be available again. This looks cool, as yesterday I tried hooking my Bela inline with some Euro signals and my first impression was "wow, really quiet" followed by "sounds really distorted" which are both probably due to signal mismatch.
I have a 10U 84 HP Eurorack system I've been building for a couple years, and I have mostly tried to avoid "deep" modules (ones with menu screens and all sorts of hidden modes and functions) because I'm getting old and can't remember all that stuff. One of Eurorack's great advantages to a musician is its immediacy - you grab a knob and something happens. Once you start adding menus it get harder, but some things want a menu rather than expanding the module to cover half a meter of area!
I have an "Ornament and Crime" which is a "deep" Euro module that mostly does different types of quantization and CV generation for making chords. And without the screen of course it would be impossible to use.
So my concern about using Salt is just that - how am I going to remember what the thing is doing without a UI?
BUT - if you can render a Faust GUI over the network on a browser, that could alleviate a lot of that concern. I have a Raspberry Pi with a little 7" LCD that could be mounted somewhere nearby.
So keep in mind here:
a) I am not SET on having everything fit into a Eurorack format
b) this stuff is never leaving the location where it's currently set up, unless I move house
c) I'm OK with different bits of kit communicating over the network.
If Salt can connect to my WLAN by adding an 802.11 USB dongle, that would be OK and preferable, since then my Ubuntu host (where I would do Faust program development and run the distcc) and a Raspberry Pi (where I might want to render the patch's UI) and and Android tablet (where I might want to run an app to send OSC messages) could all easily connect.
I'm a little skeptical about wi-fi working inside of a metal enclosure, but I could either extend the BBB's USB port using a cable or use the Salt expander which puts the USB port on the front panel.