Image in the article says TSMC 28nm.
https://www.cnx-software.com/wp-content/uploads/2020/09/Pico...
https://www.cnx-software.com/wp-content/uploads/2020/09/Pico...
TSMC has massive economies of scale and are just very hard for alternatives to compete with.
https://www.reuters.com/article/us-usa-china-smic-exclusive/...
Exclusive: Trump administration weighs blacklisting China's chipmaker SMIC
This is the exact reason why RISC-V is getting increasingly more attentions.
Thanks for the citation!