Many things about jazz guitar have stayed the same. The epicenter of the hottest jazz is still New York City by most accounts, the improvisational qualities of it are the same, many of the traditions are the same.
Modern-jazz-guitar
Get the Jazz Sound On Your Favorite Records Before I even get started, I'd like to mention that you don't want to put all of the weight of your sound into your gear. As the old adage goes, "the tone is in your fingers."