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Note that the TSMC 7nm process is similar in feature size to Intel 10nm.

Strange that there's no citation for that claim.. do you have one?

Here’s a comparison of the GF 7nm and Intel 10nm. It’s the same for TSMC afaik https://www.semiwiki.com/forum/content/7191-iedm-2017-intel-...

Both Transistor Gate Pitch (nm) and Interconnect pitch (nm) are same or smaller for Intel's 10nm process compared to TSMC.

Looks like Intel isn't having much luck there.