If the "mic body" on the other end of the active cable is basically just an XLR adaptor (with no active circuitry, as is mentioned several times in this thread), why can't Senn just make an active cable that connects to the caps on one end, and then a standard XLR plug on the other?
Because it reduces the flexibility of the system.
Also - the cables are all stereo capable.
At the moment the cable can have one or two mics going down it (Y-cable coming) - at the other end can be the XLR-3 module, XLR-5 module (coming - I hope), MZD 8000 AES42 digital module, etc.
As it is now you can plug one extension into another to make a longer one - or have two heads on a catenery one on a 3m cable the other on a y-cable, the end of the 3m is connected into the other half of the y-cable and the output of the y-cable connected to a 10m cable, etc....... (for example).
A very flexible system.
For XLR they would have to do cables in all lengths with both XLR-3 and XLR-5 options.
They may come eventually - but if you need an XLR version, just cut off one end and solder on an XLR.
I hope this is clear.