It's just a big amp for any desk. A better size would be 8x12" or s (lop 4" off the side). This is an OK desktop size. 8x16" is huge.
I'm less worried about stacking, because "desktop" to me means more "all in one." Gungnir, Freya, etc are fine at 16" wide because they sit on shelves and are more frequently used with speakers (and, in the case of Freya, they have remote control).
Of course, a new chassis size IS a huge pain in the ass for someone who wants to stack gear. But again, nothing is set in stone. I'm just blue-skying here.
LISST sold pretty well to start, then dropped off a cliff. Novals are now out of stock and not listed as options. Octal will soon get there, and we won't make any more. If I take a look at LISST again, I'm going to design a proper, die-cast, dis-assemblable case for the product, hopefully key-locked so nobody takes them apart and grabs onto several hundred volts if it's in a running amp. I would also look at re-curving the devices so they behave more like tubes. The difficulty of both together means we probably won't be doing LISST again.
One way to simplify the line is to kill products. Another way is to remove options. We're removing some options--specifically, the low-take-rate, pain-in-the-rear-end stuff, like LISST. (Oh yeah, and if Asgard 3 in Continuity form ever comes to pass, don't be surprised if it is ONLY sold with the 4490 DAC at $299--no option for amp-only. But that's still a BIG what-if.)
I personally stack my Mjolnir 2 on top of my Gumby and they both sit on my desk so it would be pretty sad if that form factor stopped being added to.
I also use a Lyr 3 as well and would love a Mjolnir 3 updated to similar topology as the Lyr 3 is definitely a huge step up from Lyr 2.