The range that virtuoso musicians extract from a guitar continues to.
Check out some youtube of Steve Cowan who won the competition at Boston Guitarfest. The variation he extracts from the guitar gets lost in YouTube translation. But from one instrument, he gets incredibly smooth mellow tones that sustain, harsh buzz tones, tight fingered runs, powerful tones and much more.
Instrument makers at the festival included:
Jeremy Clark of 52 instruments who has been making guitars for about 7 years.
Joreon Hillhorst who had unique struts and bracing in his guitar. His designs are big in power and intensity.