I’m sure it can fly in IMC.
It just might not have all it’s capabilities in targeting.
But that’s the nature of high tech. An LGB years ago didn’t like clouds. And GPS doesn’t like triple canopy jungle and metal fences for ground troops. Wire guided systems don’t like water, lasers don’t like dust/smoke/foliage between the target, but I don’t think anyone would argue that a laser guided bomb, GPS, or laser ranger finders on tanks haven’t proven their value many times over.
High tech works in the realm of probability of intercept/hit with variations in effectiveness depending on the conditions.
A clump of steel is a clump of steel. It’s RHA is the same at -50 or +50C, it don’t matter if you hit with an EFP, HEAT or a penetrator, it’s RHA is what it is. But it also weighs a lot.
Like Trophy for a tank, it used to be ineffective against dive attack munitions, or volley fires... ERA is ineffective under certain conditions (multiple hits in small area - EFP) The point being is that these new technologies tend to bring with them constraints, no doubt, but that doesn’t mean they don’t work.