Because manufacturing costs in China are rising.
Bottom line, there are plenty of NA brands to chose from. Servicing an import product if something breaks with todays shipping cost is not fun.
Doge (China to USA) Tariff
I really wanted to make a move to a Doge 7 Mk2 tube DAC. But the policy to charge a 25-percent import tax because of a multi year political game means I'll be looking for something else. The dollar amount comes to an extra $500 give or take. Nope, won't support a bloated tariff. Plus, add about $275 for international shipping and there is just no way.