I don't feel that the technological evolution that is currently underway in (mainstream) cycling is producing unsupportable machines, 10/11 speed, electronic shifting, parts becoming obsolete.

Small companies can and do tool up and produce (Or have them made overseas) C&V style parts because the technology had hit a happy plateau between functionality and durability. In 30/40 years we could still be seeing C&V replacement parts being produced, but we won't see many 2015 Carbon bikes rolling around.