When my Steger Mukluks wore out, I did not get new ones.
I do not think they are a great option for overnight winter hiking.
First off, as mentioned, is the need to stay away from wetness. That’s pretty tough to do. Even in cold winters there may be rivers or lakes with slush or overflow on them. And even here in northern Minnesota, we are getting  some above freezing days each winter lately.
Second: the lack of grip/support from the sole:
if you have firm snow it is impossible to kick steps on a side/up/downhill. Even on fairly level ground, the lack of firm sole and tread lugs makes for less grip.
The super soft materials over the foot make snowshoes less comfortable to wear.
Unless you are hot-tenting, you will be building up moisture in your liners. To mitigate this, we use VBL for winter backpacking.
But, if I use VBL socks, the benefit of the breathable mukluks is negated.
So, instead now I use a closed cell foam (alpine ski touring) liner boot inside a (downsized) Neos Overboot:
It gives me the lightweight, easy on off, calf height gaiters built in, removable liners for drying, all like Steger mukluks, but with:
- Full waterproofing up to mid calf
- non absorbent (and much lighter) liner, so even if I fill my boot with water, I can pour it out, and I’ll be fine
- firmer, more cushioned material over the foot, so snowshoes are comfy to wear
- A firmer sole with tread, so better grip and some (still not great) ability to kick steps
Here are some liners. For a good deal, search for Scarpa liners, they often come up on close out it seems.
https://skimo.co/boot-parts