They're not just regular screens. They're highly hardened, redundant, specialized displays, it's a whole industry.

There are companies that make displays that have clear conductors over the screen so they can heat them so they can be used and maintain function even when on the deck of an aircraft carrier in the arctic.

There are companies that still make CRTs for specific military purposes.

These screens are safer, more reliable, and durable than the mechanical systems they replace.