The DXG is one of the first 'green' LPG's that sound like a true lopass gate that honors Don Buchla's legacy. It doesn't just replace good old Optomix, it adds a lot of patching power in that same 8 HP footprint. First and forremost, it's the World's first dual stereo LPG. On mild settings it sounds like the Optomix. Push it a bit harder, and you'll get the top LxD channel which has this 12 dB 'bite'. It also offers the dynamic response from the 0Coast and a stereo Aux that can be used as an FX send/return when you patch Ch 2 to your effects chain. It's highly recommended to get your moddemix back in your case, because strikes can now be velocity sensitive and you can use it to 'damp' the model. The DXG will seriously extend your sonic potential and also works very well in the Old Shared where you can use four DPO outputs and mix ErbeVerb and Echophon back in.

There's just one 'caveat' I found. There's no CH1 output. This goes directly to the 'Sum' out. So in the old Shared, you'll need to use a module like moddemix to get access to that mono sum, which is needed by the EP and EV. But that's an easy workaround :).

This video features a patch from the DXG manual, created by Ryan. It's called the Stereophonic Ethereal Woodland Space Drone. With a name like that, I just had to give it a try.

I was convinced I'd miss Optomix when using the DXG, but honestly, I do not.
It's easier to miss the DXG when it's gone. But then you can still use the XPAN to patch loads of sounds to the Optomix and add some dynamics by crossfading and panning. I am really looking forward starting the first episode of the new Shared System X tutorial series. The 'X' is not an official system, it represents your personal custom machine.

Final notes about the four vactrolfree alternatives I shown in the video.
Rabid Elephant's natural gate is brillant, but it's unobtainium and goes for ridiculous used prices. It's good, but not worth $800. Endorphin.es Sqwk Dirty offers two LPG models, but they only strike. There's no 'ctrl' equivalent to use an envelope (e.g. Maths). The Steady State Gate is more like a circuit bent resonant experimental LPG from a parallel universe and doesn't sound like a Buchla. Finally, Mutable Streams has a vactrol model, but there's just no life in it. These are my personal assessments but modular is about bulding your own personal dream machine and I feel an LPG should sound like the classic Buchla 292 Quad LoPass gate. But that's just me.