https://www.researchgate.net/publication/251930892_Practicality_o...

https://www.researchgate.net/publication/251930892_Practicality_of_Evaluating_Soft_Errors_in_Commercial_sub-90_nm_CMOS_for_Space_Applications

Practicality of Evaluating Soft Errors in Commercial sub-90 nm CMOS for Space Applications

Inclusion of commercial technologies in civil spaceflight applications is reality. These technologies enable higher performance, reduce power consumption, and ultimately yield better science. However, the benefits do not come without cost, and radiation-induced soft errors in advanced, sub-90 nm CMOS technologies present new challenges. These challenges include sensitivity to proton direct ionization, memory technology evaluation, as well as testing and evaluation complexity.


---

i think this is a likely explanation for why NASA is chasing 90nm