Yeah, they did this with all the good British bicycle brands. Raleigh, Dawes and so on; they were good bikes. Nobody makes good bikes in the UK any more. The good bike makers got bought by Chinese companies, and the results are crap. Get a USA bike. Trek are good value.
Yeah, same with a lot (but not all) US bike companies. Cannondale was a family owned business, got bought by private equity, and manufacturing moved overseas. I can't say much as to the quality of their bikes, they're probably still fine, as high end bikes are all about geeking out over the tech, and you don't cut corners on that kind of market, but still.
As do 99% of bicycle manufacturers producing CF frames - the expertise and manufacturing base are primarily in Taiwan, and everyone from Trek to Canyon are sourcing from the same few people. There are some boutique brands still doing lugged carbon builds that may be assembled in the USA with the AL components manufacturer here as well, but they'll be more expensive and worse performing models for the crowd who hasn't moved on from their "steel is real" phase.