They will only shift if it's predictable that the tariff policy will stay for long enough to recoup the high capital investments of building a whole new factory just to serve the internal market.
For many industries it might not make sense unless it's a 5-10 years long plan, the risk of investing a lot to build a new factory, bringing it online over the next 2-3 years, to then have tariffs removed and making your new shiny factory more expensive to run than one outside of the country, will also be factored into the total cost.
The tariffs are so broadly applied that the risk factor is much more massive than anything the USA experienced before (like during the Japanese cars era of the 70s/80s), it's wishful thinking the domino effect will happen in the short/medium-term.
For many industries it might not make sense unless it's a 5-10 years long plan, the risk of investing a lot to build a new factory, bringing it online over the next 2-3 years, to then have tariffs removed and making your new shiny factory more expensive to run than one outside of the country, will also be factored into the total cost.
The tariffs are so broadly applied that the risk factor is much more massive than anything the USA experienced before (like during the Japanese cars era of the 70s/80s), it's wishful thinking the domino effect will happen in the short/medium-term.