Neuromorphic computing was a hot topic when IBM released TrueNorth in 2015.
Exascale sucked all the air out of the room through the early 2020s, but neuromorphic appears to be resurfacing as a hot post-exascale topic.
DOE ran a series of requirements gatherings for post-Exascale in September 2024, and neuromorphic was the topic of one workshop.1
Independently, Juelich has suggested that they are going to invest in neuromorphic after they deliver JUPITER.2
In a personal conversation with someone in neuromorphic in September 2024, I learned that there are analog and digital (CMOS) approaches to neuromorphic. TrueNorth is a digital implementation. I don’t know if there has ever been a commercial analog implementation.