Forfeiting leadership
All that the US has achieved by doing this has been to motivate China to become an alternate source/supplier for all these technologies. The result will be that they will compete and undercut all western companies forcing them to struggle. The China will continue to move forward with extremely high momentum while western companies (and Taiwan) struggle to recoup their investments on R&D. Eventually China will end up as the preferred suppliers for all these technologies.
The wins for the west are short term and short sited. Even if the restrictions are lifted today, China’s forward momentum will only slow, not stop. They will cut their dependence on western suppliers.
The only good news is, by the time China is far in the lead, the people responsible for starting this will be too old (or even dead) to care… as if they’re not pretty much there already.