40nM is about 13 years old at this point, and has been replaced superseded several times. https://en.wikichip.org/wiki/40_nm_lithography_process https://en.wik

40nM is about 13 years old at this point, and has been replaced superseded several times. https://en.wikichip.org/wiki/40_nm_lithography_process https://en.wikichip.org/wiki/40_nm_lithography_process Probably the only reason that line is still running would be validated long term stability products, or niche hardware designed with special application compatibility (E.G. radhard, higher end mil / aerospace concerns, maybe automotive). Semiconductor tooling is rather expensive and I imagine that updating this to a more modern line would require overhauling and re-balancing many systems. It might help someone not familiar with the industry to imagine each technology node as an entirely new model of car.