At a certain threshold, miniaturization of electronics can become counterproductive for space applications. The amount of radiation received per unit of area remains constant but our transistor density keeps increasing, which means that every individual event threatens to wreak an increasing amount of havoc (e.g. more bits flipped in RAM per cosmic ray). Considering the increasing amount of error correction and redundancy needed to counter this, we may reach a practical floor on transistor density for such domains.