MADI is a good decision if you consider the potential.
Dedicated network Infrastructure for audio
64 channels, still 32 @88.2/96 kHz
Glass fibre connection with lower dampening supporting up to 2km cable length between every (!) device which allows for a very flexible ring structure from recording interface across several MADI devices in different recording rooms back to the interface.
The separately available RNE "MADI router" allows to consequently expand this concept to route different MADI devices to one or more DAWs.
MIDI over MADI extension allows remote control of devices without dedicated MIDI cable which wouldn't support far distances anyway.
An automatic latency compensation between the up to 8 devices connected to one MADI channel can be configured on each MADI device.
Any to any Routing with Totalmix FX across all 8 MADI devices is possible.
All RME converters and preamps supporting MADI can be used as you like on the MADI channel and they are remote controllable by a RME application called MIDI remote which is free of charge.
Use case Octamic XTC
The Octamic XTC preamp is special, as it is the only device that can be integrated as so called "AUX device" into Totalmix FX.
This makes it possible to remote control the most important parameters (Gain, panning, PAD, Instrument, ...) of up to 8 (!!!) Octamic XTC's connected to ie UFX+ in the one Totalmix FX instance of your UFX and to even store all these settings digitally into a Totalmix FX snapshot.
The Octamic XTC can additionally be fully controlled in the recording room and if you change ie the gain at the device itself you can see faders moving in TM Fx and finally store as settings at snapshot, which is a big time saver if you need to quickly switch between settings.
Another big advantage is the versatility of the XTC itself:
All 8 Inputs can be used by XLR plugs for either MIC''s or balanced line inputs.This saves you the purchase cost for extra AD converter if you have ie to record from a mixer console.
Input 1-4 via TS plug supports PAD, 5-8 supports Instrument Input.
XTC also offers ADAT, 4 AES and two phones outputs
You can also use this device as format converter.
So .. a setup consisting of ie UFX+ and up to 8 Octamic XTC is a real killer in terms of quality and features.
And this MADI concept is further expandable by the use of the MADI router.
My setup consists of 2 UFX+:
One inside of a guitar rig emulating a parallel FX loop for my guitar amp and to integrate different guitar FX into the high quality parallel effect loop and to act as tape deck, connect guitars and for re-am ping the recorded guitar signal from Instrument Input.
The other UFX as main recording interface to connect ADI-2 Pro as high end ADDA converter and 2 x Octamic XTC
PLUS making the connection to another ADI-2 DAC in front of my HiFi which is of good quality which can be used as second pair of monitors as the monitors are very honest kind of analytic which is rare for HiFi speakers.
More infos and examples you can find in the MADI Infocenter, see RME homepage.
I think this is the picture you should have in mind for your further planning.
Hope this helps you further.
X10SRi-F, Win7 Prof, Cubase 9.5, UFX+, Octamic XTC, ADI-2 Pro FS BE/DAC, RayDAT, ARC USB