The reality is that the quality of production in those countries isn't going to match China, that is why things are still Made in China despite rising wages and geopolitical tensions.

The FT reported that 50% of Indian iPhone _casings_ did not pass quality checks [1] to be sent forward for factory use. That is just the casing, a not particularly complex piece relative to other iPhone parts. On top of that, Mac Pro production moved from the US back to China [2] after an attempt at "Made in America" due to easier parts sourcing.

I can see Vietnam getting there, but again the scale is just not comparable to China.

[1] https://www.ft.com/content/0d70a823-0fba-49ae-a453-2518afcb0...

[2] https://www.ft.com/content/0cddd49e-99d2-11e9-9573-ee5cbb98e...